英语词汇“trace”的意思、释义、用法解释及翻译-春雷网

trace¹

verb treɪstreɪs

[with object]

1Find or discover by investigation.
（通过调查）找到，发现
police are trying to trace a white van seen in the area
警方正设法查找曾在此地区出现的白色货车。
Example sentencesExamples
- Detectives eventually traced Young, who was living in Glasgow with a wife and children.
- Skipton detectives have told how they launched their biggest ever child pornography investigation to trace a Cross Hills man who posted images of abuse on the internet.
- Despite an extensive investigation, the parents have not been traced and the circumstances of the birth remain a matter of speculation.
- What was dismissed as a ‘third-rate burglary’ was eventually traced to the White House.
- Now Lloyd and Debbie Peters, who moved to Australia from Hockley, are calling for help in tracing the white Havenese dog who ran off while being groomed.
- Detectives in Salford are trying to trace the two men in a white van who tried to abduct the boy from the street in Little Hulton on Thursday evening.
- Police traced the stolen VW Polo and discovered it had been stolen from a house in Park Road, Prestwich.
- Police have so far been unable to trace the white Conway trailer, but a cheque from the Donnes has gone some way to lifting the youngster's spirits.
- Police also say they want help in tracing a Bedford van which was stolen from Abney Close in the Heeley area of Sheffield.
- Police are trying to trace anyone the teenager may have spoken to on line and say he may have used the name DJ or possibly Dee Jay.
- He also warned bogus account holders who have not yet been contacted by Revenue that tax officials are conducting further investigations to trace all such persons.
- Inquires conducted at the time resulted in a sighting of a man, who was never traced but later eliminated from the investigation.
- Gardaí are also looking to trace a white Subaru car, which was sighted around Borris at the time.
- The occupants of the BMW have never been traced despite an extensive police investigation.
- They are also extremely anxious to trace a Bedford van, believed to have been stolen from the Heeley area of Sheffield only hours before the murder was committed.
- Police are trying to trace a white Ford Escort about ten years old in connection with a spate of thefts from vehicles in the Marlborough and Pewsey areas on Saturday.
- Trolleys were loaded with boxes of cash and hidden under rubbish before being smuggled out of the bank into a waiting white transit van that has still not been traced.
- Detectives want to trace a blue Fluid denim jacket and a pair of black Rockwood shoes left in the car, which may have been thrown away or given to someone.
- Detectives are keen to trace a white camper van and its occupants.
- She gave a false name and address but was traced when the details did not match those held by the DVLA.
Synonyms
track down, find, discover, detect, unearth, uncover, turn up, hunt down, dig up, ferret out, run to ground
follow, pursue, trail, shadow, stalk, dog
find the source of, find the origins of, find the roots of, follow to its source, source
1. 1.1 Find or describe the origin or development of.
  追溯，追究，查考
  Bob's book traces his flying career with the RAF
  鲍勃的书追溯了他在英国皇家空军的飞行生涯。
  Example sentencesExamples
  On the contrary much of what is taken to be so distinctive about the Victorians can be traced back to eighteenth-century developments that have featured in this volume.
  Its origin has been traced back as far as 1856 by noted historian John Ridge.
  Debates over who is the best ball-flyer, who gets the most sleep, and who eats the most dog, can be traced to the origins of our profession.
  The origins of this state of laws can be traced to the development of feudalism and the consequent horizontal and vertical associations that were created in the British body politic.
  The difference this time around can be traced to four new developments.
  The origins of the pudding can be traced to the commercial developments of the city between 1685 and 1825.
  Their high performance can be traced to two developments.
  The history of these games can be traced to the early development of gaming on PCs, consoles, and various other platforms.
  Its origins can be traced back to as 1085 when King Alfonso VI of Castle reigned here.
  Although these developments are unexpected, their origins can be traced to China's 1996 military exercises.
  The computer, one of the greatest discoveries of all times, was born in his head, the head of a man whose origins can be traced to Bulgaria.
  It is still an ethos that is found in contemporary pubs, particularly in rural and remote regions, yet its cultural origins can be traced back to colonial mores.
  Again, its origins can be traced to Fagen's school days.
  Like most of the terms that refer to major conceptual anchors of the western intellectual tradition, its origins may be traced to classical antiquity.
  Twenty-one Presidents can be traced back to seventeenth-century origins among New England colonists.
  Each book does a splendid job of tracing the origins and development of a religious doctrine and its impact on the mundane world.
  Considering this, it is not surprising that the dance's origins can be traced back to the roaring twenties - the time of the flappers and the first Miss America contest.
  This was the most intricate painting of the show, as well as the most recent, and its development could be traced in the predecessors that hung around it.
  There were some 20 years between these commercial clunkers, yet the same thread of dull-wittedness can be traced through the origins of both.
  This is without question the first book to trace the origins of black baseball's institutional development.
2. 1.2 Follow or mark the course or position of (something) with one's eye, mind, or finger.
  追踪，跟踪
  through the binoculars, I traced the path I had taken the night before
  我用双筒望远镜追踪了昨晚走的路。
  Example sentencesExamples
  By the time it registered in my mind I was tracing the ugly teal tiles with my fingernail.
  She stared at it, her fingers tracing the indents were small crystal diamonds filled the interior lining.
  She paused, staring at the back, one finger gently tracing the black rune that appeared to have been burned into it.
  He wiped a bead of water off my lip, his strong fingers tracing my lips for a moment as he got closer.
  It had claw marks across its wooden panels, and when I traced them with my finger I decided that they were far too big to be from some kind of animal.
  He was gazing out the window and his fingers were tracing the scar on his cheek.
  My hand went automatically to my own neck, my soft fingers tracing the violet spirals adorning my pale back.
  She studied them with her own fingers, tracing each scar and noticing his gaze through her eyelashes.
  I felt what I imagined to be someone's fingers tracing the outline of my face.
  His finger traced the institute on the map, and the trail to the rest of the Yellow society.
  Panama is absent-mindedly traced by someone's finger.
  His fingers trace the headlines and the picture captions; then he gives up and his lips cease to move.
  He reached out his hand and his fingers traced her laughing smile.
  Slowly realization dawned onto him and he suddenly wrapped his own arms around her waist, a single finger tracing her spine upwards and then back downward again.
  She felt Molly's tiny fingers gently tracing her necklace.
  His fingers traced the sides of my face, like a child would who was examining the skin of a grandparent.
  There are people who can ‘read’ what a CD's print letters say by tracing it with their fingers.
  Yohanna's fingers traced a silver crescent mark on the babe's forehead and in that brief moment Yohanna recognized her.
  Dragging her left hand up his chest flirtatiously, Jessie stopped at his lips, softly tracing them with her fingers.
  His small face flushed with delight, his finger tracing the print of the title.
3. 1.3 Take (a particular path or route)
  沿（特定路径）走
  a tear traced a lonely path down her cheek
  一滴泪珠孤寂地滑下她的脸颊。
  Example sentencesExamples
  Viewers follow her progression slowly as she bides her time and moves through life confident of the path she is tracing.
  I watched in horror as he shivered, streams of tears tracing paths through the dust on his cheeks.
  A lonely tear traced a path much traveled down her cheek, but she wiped it away.
  He lay back on the mattress, looking up at the ceiling, as the single tear tracing down his cheeks was lost among the sea of swelling purple and black.
  A narrow stance, where the rear, downhill skate nearly traces the same path as the lead skate, makes it easier to steer them across and if necessary, up the hill to cut short your run.
  More tears fell from her eyes and traced the preceding paths of tears.
  She turned her head away, the tears beginning to trace paths through the thin layer of sand coating her cheeks.
  Tears traced a familiar path down her dirty face.
  Debussy's quartet moves like a snake through the forest, tracing an unpredictable, yet in hindsight inevitable, path.
  A lone tear traced its path down Serena's face as she set off into the forest, holding Gideon's hand tightly.
  Day after day I trace a pleasant, safe path into and out of nice little towns and villages, along soft verged roads and through gentle, rolling landscapes down to a calm sea.
  The Sun crosses the celestial equator from north to south as it traces its apparent annual path against the background of stars.
  The trajectory is the path traced by the center of gravity of the projectile from the origin to the level point.
  A mounting swell of emotion crested in his soul, then broke like a storm-tossed wave on the shore of his heart, and he wept, silvery tears tracing down his pale cheeks.
  Deirdre murmured, a tear tracing a path down her cheek, from sympathy, or from the bruises Alana was probably inflicting, he had no idea.
  Last year Toti and the chef traced the route Giffords planned to take and visited local farmers' markets to talk directly to farmers in order to ensure the circus kitchen was fully stocked.
  A single tear traced its course down her cheek and dropped softly to be absorbed by the wood.
  I screamed, tears tracing paths down my cheeks.
  It is a scramble, but it's not difficult and, if the crest is too airy for you, it's easy enough to trace a less exposed route on the east side of the ridge.
  The spaceship traced out a complex path across the desk, leaving a faint red screw-thread line floating in the air.
2Copy (a drawing, map, or design) by drawing over its lines on a superimposed piece of transparent paper.
映描，描摹
trace a map of the world on to a large piece of paper
Example sentencesExamples
- This will help you decide what piece to trace first.
- Then, using a light table, students traced their enlarged drawings onto good student quality watercolor paper.
- This silhouette or ‘side view’ became a pattern from which a second, identical piece could be traced and cut out.
- I had prepared a template for two portraits, which they traced onto their paper.
- With a pencil, draw or trace your preferred image onto the paper.
- They first drew their portrait on paper before tracing the sketch on to the fabric.
- On butcher paper, trace the outline of the chair seat, then add 1 inch around all sides.
- The implication of Pennell's comment is that Vermeer might have copied or traced the outlines of an image and in this way obtained relative sizes for the objects depicted.
- Using graphite paper, they traced their portrait onto the map pieces.
- So I used the box to trace out a heart-shaped piece of paper and wrote a Valentine's note to my teacher.
- The students can either start this with a new drawing, trace the one they already made or even photocopy the first one to save time.
- Last, the sketch was held firmly against the watercolor paper, while the outline of the shoe design was gently traced over with pencil.
- Between the cups, the center band or center front piece can be traced while still attached to the other half of the bra.
- We made a mosaic of the photographs covering each survey zone, and then we traced a new base map off the composite image.
- Neither the original nor the projected copy have been traced.
- When the colored pieces had all been traced, students used high-gloss polyurethane to paint both sides of the construction paper.
- Try tracing each plaited mat design, making sure you don't change direction at any intersection.
- Making clones of clones is like tracing a master painting through thin paper and expecting the copy to appear just as perfect as the original.
- In this instance, I encourage them to trace the drawing or part of it on tracing paper.
- If you are not confident in your drawing skills, you may want to use a piece of tracing paper and trace the image you would to place on the rubber stamp.
Synonyms
copy, reproduce, go over, draw over, draw the lines of
draw, draw up, sketch, draft, outline, rough out, mark out, delineate, map, chart, record, indicate, show, depict
1. 2.1 Draw (a pattern or line), especially with one's finger or toe.
  （尤指用手指、脚趾）画（图，线）
  she traced a pattern in the dirt with the toe of her shoe
  Example sentencesExamples
  She lay in his arms, her head resting on his chest, her fingers tracing random, abstract patterns on his chest.
  She dipped her hand in the fountain, her fingers tracing lazy eights.
  Now, with your finger, trace a few quick lines in the heap, imposing some sort of visual rhythm.
  He reached up with one dirty finger, tracing a tiny smile in the fog he had made.
  Dust had collected on the tube's surface, turning Nick's finger a dark gray once he ran his finger across it, tracing a clear streak across the cloudy tube.
  His finger traced a light circle around the wound.
  I knew where his hands were on my back, I could feel the patterns he was tracing with his fingers, where my hands were behind his neck, the fireworks exploding in my head.
  His hand gripped the hilt of his sword, the blade drawn but down so the point traced a line in the snow.
  Sighing, Jeff looked downward, his fingers tracing out a pattern on the counter.
  Her hand moved over the sand slowly, tracing out strange patterns he couldn't distinguish.
  My finger traced a smiley face onto one of the condensation-covered windows of Matt's car as it pulled onto the grass that was my grandmother's driveway.
  I started tracing a weird, abstract pattern of something or other on her window that had fogged in the cold afternoon.
  He realised for the first time that his left arm had wrapped around her other side to hold her in an embrace, and that his fingers were tracing small circles over her stomach.
2. 2.2 Give an outline of.
  勾画出轮廓，描绘
  the article traces out some of the connections between education, qualifications, and the labour market
  这篇文章勾勒出教育，资格及劳动力市场之间的某些联系。
  Example sentencesExamples
  Figure 6.3 is a useful alternative way of looking at this issue since it traces out combinations of prices for the two markets which yield the same levels of consumer surplus or profits.

noun treɪstreɪs

1A mark, object, or other indication of the existence or passing of something.
痕迹，踪迹
remove all traces of the old adhesive
除去所有旧的粘合剂留下的痕迹。
mass noun the aircraft disappeared without trace
飞机消失得无影无踪。
Example sentencesExamples
- Remove remaining traces of wax with a cloth moistened with mineral spirits (paint thinner) or cream furniture wax.
- A gambler would probably ask how many zeroes need to be added to the donation for all traces of morality to disappear.
- It has written to all the parties to warn them to remove all traces of the posters within the allotted timeframe and said some local authorities are offering a recycling service to encourage the process.
- But I think that even if I get rid of all visible traces, that mark of vulnerability that he's left on my home will remain for a long time to come.
- It was just this cleansing oil that's supposed to remove all traces of makeup so you are ready to go sleep with no risk of clogged pores.
- Remove all traces of a normal childhood, market him well and watch as he rises to superstardom.
- The pistol was cleaned with liberal applications of Crud Cutter until there were no traces of old lube remaining.
- Following the inspector's decision, Mr Crawford has six months to remove all traces of the extension.
- This is further refined by carbon filtration to remove any traces of molasses before crystallization.
- Today, they had disappeared without a trace, not even in evidence on a remainder table.
- While the vast majority of films disappeared without a trace, a few ones survived the passage of time and retained their appeal.
- Surely our leaders would be better engaged to remove all traces of film music from our holy places rather than chasing female marathon runners.
- Gold's faster-paced songs had a vacant way of flowing through you and leaving no residual traces of their passing.
- The building of the Bow flyover removed all traces of the old bridge, and the River Lea is now barely visible beside the dual carriageway beneath.
- This step stimulates the circulation, reduces oiliness, helps to refine the pores and skin texture, and removes the last traces of grease, dead cells and grime, and firms the skin.
- Next my face was cleansed to remove impurities and all traces of make-up.
- Is it they way they take previously nice pubs and turn them into standardised bright yellow tackfests, thus removing all traces of character and individuality?
- Kelly takes pains to disguise them, to remove all traces of expression.
- In this case, it removes any traces of sympathy I might have had.
- But after she underwent chemotherapy, minor surgery and radiotherapy, all traces of the tumour disappeared.
Synonyms
vestige, sign, mark, indication, suggestion, evidence, clue
remains, remnant, relic, survival
ghost, echo, memory
trail, track, spoor, marks, tracks, prints, imprints, footprints, footmarks, footsteps
1. 1.1 A line or pattern displayed by an instrument to show the existence or nature of something which is being recorded or measured.
  描记线，描记图
  Example sentencesExamples
  Objective responses are recorded on a polygraph trace.
  Baxter must now wait to see if the IOC will agree to a second test to establish the nature of the trace detected.
  In this instance, 10 traces were recorded simultaneously, in real time (only one trace is shown in the figure).
  It is a trace of the electrical activity of the human brain.
  Computer analysis of the trace is used to retrieve the spectral phase of the input pulse (a).
  The duration of the stimulus presentation was synchronized with the refresh traces of the monitor.
  Only recently have correlators become available that can also record the intensity traces.
  Fig.2 A shows typical current traces recorded for synaptophysin channels.
  It records the trace of that one-minute or twenty seconds - which can seem very long - of standing face to face with another person.
  During recognition, the probe accesses the traces of all studied items in parallel.
  A direct writing electrocardiograph was attached, and I was offered the trace.
  Sequencing traces were processed using Sequencher (Gene Codes, Ann Arbor, MI).
  A total of 16.4 million DNA sequencing traces were processed using the pipeline depicted in Figure 1.
  The traces were recorded at different voltages.
  The consensus model presented here is derived from the results of analyzing only six traces recorded in response to a single perturbation.
  When the Bug detects Mr. Grout, we expect to see spikes in the neural traces displayed on the lower half of the monitor.
2. 1.2 A physical change in the brain presumed to be caused by a process of learning or memory.
  （大脑上的学习或记忆）痕迹，印迹
  Example sentencesExamples
  But of course, traces of his memory still lingered in the back of her head, just waiting to be re-awakened.
  In addition to encoding stimulus intensity information into the episodic trace, it is likely that response information is encoded.
  Reconstruction of the mental trace in a complex process, after the fact, is a major challenge as few realize.
  Greg Edmonson's fractured landscapes show traces of memory that linger as layers within the spaces of our mind.
  Remote traces of their memory still seemed to exist somewhere in me.
  The dim light makes the figures in the background literally hard to see, as if they were fleeting traces of memory, just beyond the viewer's grasp.
  Yet they remain as traces in the memory of country.
  The palace at Versailles was for Louis a haunted house in which spectres of his great-grandfather mingled with the memories and traces of his lost loved ones.
  It's now possible to map music's traces in the brain, study its impact on the immune system, and listen to the songs of black holes and living cells.
  You dilute the active ingredient down till there's just a trace or memory, an essence - so it's the vibration of the flower that's working.
  Commitment to memory or a given past is weak if its physical trace is planned to be removable and possibly replaced.
  This allows us to assess whether response information is included in the episodic trace, as has been suggested by Neill.
  Vague traces of memory returned to her with the rush-slap of waves against the sides of the boat and the pregnant silence of the company.
  They came to him evanescently, and left without leaving a trace in his memory - so brief and so quick.
  According to models of episodic memory, contextual similarity is a driving force in influencing the probability of the retrieval of an episodic trace.
  Maintaining a large number of memory traces over long time periods has biological costs, which might be greater than the costs of allowing some traces to deteriorate.
  Mean familiarity across all traces in memory indexes the likelihood that a match response is elicited.
2A very small quantity, especially one too small to be accurately measured.
微量，少许（尤指太少无法精确量算）
his body contained traces of amphetamines
他身体里有微量安非他明。
as modifier trace quantities of PCBs
微量多氯化联苯。
Example sentencesExamples
- A urine sample contained traces of the drug and Norton faces a six months ban at a disciplinary hearing.
- When it comes to beating a drug test, there are basically three approaches: supply a fake sample, mask drug traces or hold them all in.
- But finally the state enforced better emissions standards, and the talc disappeared, except for traces here and there.
- In the early days of DNA testing, samples had to be over a certain size for scientists to work with them, but now the smallest trace of body fluid or even skin flakes can provide a profile.
- Both the very high residual sugar and the trace materials secreted by the botrytis into the juice inhibit fermentation.
- The machines get their name because they blast a ‘puff’ of air over a passenger, and the sample is then analyzed for traces of explosives residue.
- The hope is that someday people could wear a badge that would turn a color or make a noise when an specific nerve agent is present in trace quantities.
- A trace amount of mercury is more than the body needs.
- If homeopathic theory was correct, the trace amounts of caffeine in decaff ought to have me bouncing off the ceiling.
- The dogs are trained to find blood-stained weapons, clothing and property, miniscule traces of blood and body fluid.
- An autopsy showed high levels of carbon monoxide in her blood as well as traces of amphetamines.
- Each pit can hold a trace quantity of a chemical that reacts to a certain protein found in the blood.
- But current studies show that, ingested in the trace amount found in Hinkley's water, or in food, it's harmless.
- Cadmium is found in all soils in at least trace quantities.
- It'll go away in time, about the same time as you stop leaving traces of explosives residue about the place.
- As science becomes better at measuring small amounts of trace chemicals that are potential carcinogens, the zero risk approach is increasingly restrictive.
- Fairweather suggests this may point towards incoming prisoners changing the type of drugs they use from cannabis, which leaves traces in the body for a long time, to heroin, which is quickly flushed from the body.
- In response to revisionist charges, they tested the gas chamber walls for residual traces of cyanide gas but found none.
- Ammonia, for example, is present in trace quantities, yet it is considered to be essential in maintaining soils at a pH of around eight, that is, optimal for sustaining life.
- The datolite from this locality also showed traces of platinum but in insufficient quantities to be the coloring agent.
1. 2.1 A barely discernible indication of something.
  丝毫；勉强可以发现的痕迹
  just a trace of a smile
  仅是一丝微笑。
  Example sentencesExamples
  ‘Thanks,’ she said, looking flustered, but I noted that her lips held the traces of a smile.
  Any trace of a smile that I had on my face at that time fell.
  He may be a little world-weary, but behind the half-beard and the straggly locks there's the faintest trace of a smile.
  Butler is softly spoken with a trace of an Edinburgh burr still discernible in her gentle Canadian accent.
  The trace of a smile flickered across head coach Wu Jingui's face.
  Alex smiled, hiding traces of bitterness from her face.
  ‘You're always damned by the exception,’ Hill says with the slightest trace of a smile.
  There is a faint trace of a smile, but he does not flinch: whatever the honorary boyo's faults, he is unlikely to be bought with a knighthood.
  Gregory smiled, the traces of sadness slowly vanishing.
  Her raised chin and an ‘upside-down smile’ reveal traces of disgust, anger, and sadness.
  But I could see faint traces of a smile starting to appear.
  A trace of sadness was barely audible in Cattia's flat voice, perhaps such a small sliver of one that only Tania really could pick it up.
  So he buckled right in with the trace of a grin on his face.
  I could hear the traces of a wistful smile in his voice.
  Josh's breathing grew shallow and a single tear dropped from his eye, but I could see the traces of the smile I loved so much beginning on his face.
  She rolled her eyes, but a trace of a smile graced her lips.
  Michan thought he saw the traces of a smile in the Commander's eyes.
  The boy turned and walked back into the woods, then paused and turned back towards Kevin, all former traces of a smile replaced by a grim anger.
  It is a tribute to him that there is barely a trace of tedium in a performance lasting more than four hours.
  Zach shrugged, the faintest traces of a smile appearing on his lips.
  Synonyms
  bit, spot, speck, touch, hint, suggestion, suspicion, nuance, intimation
  trifle, drop, dash, tinge, tincture, streak, shred, crumb, fragment, shadow, whiff, breath, jot, iota
  informal smidgen, tad
3A procedure to investigate the source of something, such as the place from which a telephone call was made.
（确定来电话者或计算机程序里确定故障源的）跟踪
we've got a trace on the call
Example sentencesExamples
- Witnesses took the number of the car and police conducted a trace on the vehicle.
- In the beginning of the film, Trinity is on the phone and we see the computer doing a telephone trace.
4A line which represents the projection of a curve or surface on a plane or the intersection of a curve or surface with a plane.
交线，迹线，轨迹
Example sentencesExamples
- The thick black curve of Fig.2 illustrates representative traces of tension versus time.
- The sheets are bilobed about a median furrow, visible in both vertical and horizontal sections, and form straight to gently curved, cross-cutting traces.
- The axis of the trace is curved slightly to the left.
5North American West Indian A path or track.
Example sentencesExamples
- S'sahr barked an order and there were groans, but the troopers spread out keeping eyes open for any traces or tracks.
- Path was synonymous with trace, another invaluable gift that pioneers used to penetrate the otherwise impassable.
- Here, however, it came to be another old and enduring track through otherwise treacherous and disorienting terrain, a variation of path and trace.
6Mathematics
The sum of the elements in the principal diagonal of a square matrix.
〔数〕迹
Example sentencesExamples
- This paper is more than an extension, however, for in it he used matrices, in particular the trace of a matrix, to greatly simplify the formulas he had presented in his 1926 paper.
- The sum of the eigenvalues is the trace of this matrix and it is sometimes called ‘total variance.’
- There is a clue to the way neural circuits control the disruptive forces of chaos in the trace in Figure 3.

Derivatives

traceability

nountreɪsəˈbɪlɪtiˌtreɪsəˈbɪlədi

He said sheep tagging and traceability will assist in resolving illegal movements but the reality is that tagging in itself will not apprehend and root out rogue dealers.
They include traceability, safe farm practices, prudent use of antibiotics and chemicals, pasteurisation and meat contamination.
Minister Joe Walsh described NSIS as a most important development in progressing animal identification and traceability in Ireland.
Example sentencesExamples
- Traceability will underpin all future food safety legislation.
- We need traceability and a surveillance system that ensures early recognition of a disease problem.
- Traceability is a fundamental requirement for organic certification.
- As the community is small, complete transparency and traceability is guaranteed.
- Traceability from field to plate is essential in today's consumer market.

traceless

adjective ˈtreɪsləsˈtreɪsləs

No human tracker will be able to follow up the movement of this man's traceless passage.
Example sentencesExamples
- Stories travel through the minds of those who receive them, and follow traceless, timeless paths unaccountable to rational means.
- They've found all thirty people, nameless and traceless!
- The next morning we learned of your seemingly traceless disappearance.
- With this experience, the traces of enlightenment are eliminated and a life of traceless enlightenment is limitlessly renewed.

Origin

Middle English (first recorded as a noun in the sense 'path that someone or something takes'): from Old French trace (noun), tracier (verb), based on Latin tractus (see tract¹).

train from Middle English:
Before railways were invented in the early 19th century, train followed a different track. Early senses included ‘a trailing part of a robe’ and ‘a retinue’, which gave rise to ‘a line of travelling people or vehicles’, and later ‘a connected series of things’, as in train of thought. To train could mean ‘to cause a plant to grow in a desired shape’, which was the basis of the sense ‘to instruct’. The word is from Latin trahere ‘to pull, draw’, and so is related to word such as trace (Middle English) originally a path someone is drawn along, trail (Middle English) originally in the sense ‘to tow’, tractor (late 18th century) ‘something that pulls', contract (Middle English) ‘draw together’, and extract (Late Middle English) ‘draw out’. Boys in particular have practised the hobby of trainspotting under that name since the late 1950s. Others ridicule this hobby and in Britain in the 1980s trainspotter, like anorak, became a derogatory term for an obsessive follower of any minority interest. Irvine Welsh's 1993 novel Trainspotting gave a high profile to the term. The title refers to an episode in which two heroin addicts go to a disused railway station in Edinburgh and meet an old drunk in a disused railway station who asks them if they are trainspotting. There are also other overtones from the language of drugs—track is an addicts' term for a vein, mainlining [1930s] for injecting a drug intravenously, and train for a drug dealer. Trainers were originally training shoes, soft shoes without spikes or studs worn by athletes or sports players for training rather than the sport itself. The short form began to replace the longer one in the late 1970s.

Rhymes

abase, ace, apace, backspace, base, bass, brace, case, chase, dace, efface, embrace, encase, enchase, enlace, face, grace, interlace, interspace, in-your-face, lace, mace, misplace, outface, outpace, pace, place, plaice, race, space, Thrace, upper case

trace²

noun treɪstreɪs

Each of the two side straps, chains, or ropes by which a horse is attached to a vehicle that it is pulling.
挽绳，缰绳
Example sentencesExamples
- Ales broke off in mid-explanation to dive into the crowd, reappearing clasping a handkerchief waving teenage girl, and yoking her into the cart's rope traces.
- The horses pulling the carriage suddenly took fright for no apparent reason, snapped the traces and bolted off, startling both the hosts and their guest of honour.

Phrases

kick over the traces

Become insubordinate or reckless.
挣脱羁绊，变得不服从，鲁莽
Example sentencesExamples
- I sense a certain aimlessness and confusion amongst those of us who keep kicking over the traces, I wonder if God isn't rebuking us for such a perversely inverted lack of grace.
- Anil's father went to the UK to study but ended up kicking over the traces and having his hair cut, which was tremendously rebellious for his community at the time.
- Never mind that you have learned something new, that you have kicked over the traces of your parents.
- Even when there is no intention to kick over the traces, the quiet understanding of compatibles offers a hint of forbidden pleasure.
- They're just kids doing what kids do, which is kick over the traces and test their independence.
- We were kicking over the traces, stepping into our own power and stepping out to get more.
- The rebel son is restless, longs to kick over the traces and seeks personal advancement.
- George is already kicking over the traces - spending too much, drinking too much, gambling too much and, as Amelia dare not admit to herself, consorting adulterously with other women.
- It was very hard aged 15, 16, 17, at a school like the Academy, at which a great number of my contemporaries were hereditary Tory, hereditary unionist, in their mentality, not to kick over the traces.
- Kapri is as charming as ever it was, the people as odd: everybody is very immoral, but fortunately not so dull as those who kick over the traces often are.

Origin

Middle English (denoting a pair of traces): from Old French trais, plural of trait (see trait).

trace¹

verbtrāstreɪs

[with object]

1Find or discover by investigation.
（通过调查）找到，发现
police are trying to trace a white van seen in the area
警方正设法查找曾在此地区出现的白色货车。
Example sentencesExamples
- Detectives are keen to trace a white camper van and its occupants.
- Detectives eventually traced Young, who was living in Glasgow with a wife and children.
- She gave a false name and address but was traced when the details did not match those held by the DVLA.
- Trolleys were loaded with boxes of cash and hidden under rubbish before being smuggled out of the bank into a waiting white transit van that has still not been traced.
- Skipton detectives have told how they launched their biggest ever child pornography investigation to trace a Cross Hills man who posted images of abuse on the internet.
- Gardaí are also looking to trace a white Subaru car, which was sighted around Borris at the time.
- Police are trying to trace a white Ford Escort about ten years old in connection with a spate of thefts from vehicles in the Marlborough and Pewsey areas on Saturday.
- Detectives want to trace a blue Fluid denim jacket and a pair of black Rockwood shoes left in the car, which may have been thrown away or given to someone.
- He also warned bogus account holders who have not yet been contacted by Revenue that tax officials are conducting further investigations to trace all such persons.
- Despite an extensive investigation, the parents have not been traced and the circumstances of the birth remain a matter of speculation.
- The occupants of the BMW have never been traced despite an extensive police investigation.
- What was dismissed as a ‘third-rate burglary’ was eventually traced to the White House.
- Police also say they want help in tracing a Bedford van which was stolen from Abney Close in the Heeley area of Sheffield.
- Detectives in Salford are trying to trace the two men in a white van who tried to abduct the boy from the street in Little Hulton on Thursday evening.
- Inquires conducted at the time resulted in a sighting of a man, who was never traced but later eliminated from the investigation.
- Police have so far been unable to trace the white Conway trailer, but a cheque from the Donnes has gone some way to lifting the youngster's spirits.
- Police traced the stolen VW Polo and discovered it had been stolen from a house in Park Road, Prestwich.
- They are also extremely anxious to trace a Bedford van, believed to have been stolen from the Heeley area of Sheffield only hours before the murder was committed.
- Police are trying to trace anyone the teenager may have spoken to on line and say he may have used the name DJ or possibly Dee Jay.
- Now Lloyd and Debbie Peters, who moved to Australia from Hockley, are calling for help in tracing the white Havenese dog who ran off while being groomed.
Synonyms
track down, find, discover, detect, unearth, uncover, turn up, hunt down, dig up, ferret out, run to ground
find the source of, find the origins of, find the roots of, follow to its source, source
1. 1.1 Find or describe the origin or development of.
  追溯，追究，查考
  Bob's book traces his flying career with the Marines
  鲍勃的书追溯了他在英国皇家空军的飞行生涯。
  Example sentencesExamples
  Their high performance can be traced to two developments.
  Debates over who is the best ball-flyer, who gets the most sleep, and who eats the most dog, can be traced to the origins of our profession.
  The origins of the pudding can be traced to the commercial developments of the city between 1685 and 1825.
  On the contrary much of what is taken to be so distinctive about the Victorians can be traced back to eighteenth-century developments that have featured in this volume.
  Considering this, it is not surprising that the dance's origins can be traced back to the roaring twenties - the time of the flappers and the first Miss America contest.
  Like most of the terms that refer to major conceptual anchors of the western intellectual tradition, its origins may be traced to classical antiquity.
  The difference this time around can be traced to four new developments.
  The computer, one of the greatest discoveries of all times, was born in his head, the head of a man whose origins can be traced to Bulgaria.
  The origins of this state of laws can be traced to the development of feudalism and the consequent horizontal and vertical associations that were created in the British body politic.
  Its origin has been traced back as far as 1856 by noted historian John Ridge.
  The history of these games can be traced to the early development of gaming on PCs, consoles, and various other platforms.
  Twenty-one Presidents can be traced back to seventeenth-century origins among New England colonists.
  Again, its origins can be traced to Fagen's school days.
  Although these developments are unexpected, their origins can be traced to China's 1996 military exercises.
  There were some 20 years between these commercial clunkers, yet the same thread of dull-wittedness can be traced through the origins of both.
  This was the most intricate painting of the show, as well as the most recent, and its development could be traced in the predecessors that hung around it.
  Its origins can be traced back to as 1085 when King Alfonso VI of Castle reigned here.
  This is without question the first book to trace the origins of black baseball's institutional development.
  Each book does a splendid job of tracing the origins and development of a religious doctrine and its impact on the mundane world.
  It is still an ethos that is found in contemporary pubs, particularly in rural and remote regions, yet its cultural origins can be traced back to colonial mores.
2. 1.2 Follow or mark the course or position of (something) with one's eye, mind, or finger.
  追踪，跟踪
  through the binoculars, I traced the path I had taken the night before
  我用双筒望远镜追踪了昨晚走的路。
  Example sentencesExamples
  I felt what I imagined to be someone's fingers tracing the outline of my face.
  It had claw marks across its wooden panels, and when I traced them with my finger I decided that they were far too big to be from some kind of animal.
  He reached out his hand and his fingers traced her laughing smile.
  Panama is absent-mindedly traced by someone's finger.
  He wiped a bead of water off my lip, his strong fingers tracing my lips for a moment as he got closer.
  His finger traced the institute on the map, and the trail to the rest of the Yellow society.
  His fingers traced the sides of my face, like a child would who was examining the skin of a grandparent.
  She studied them with her own fingers, tracing each scar and noticing his gaze through her eyelashes.
  Slowly realization dawned onto him and he suddenly wrapped his own arms around her waist, a single finger tracing her spine upwards and then back downward again.
  Dragging her left hand up his chest flirtatiously, Jessie stopped at his lips, softly tracing them with her fingers.
  He was gazing out the window and his fingers were tracing the scar on his cheek.
  She stared at it, her fingers tracing the indents were small crystal diamonds filled the interior lining.
  His fingers trace the headlines and the picture captions; then he gives up and his lips cease to move.
  There are people who can ‘read’ what a CD's print letters say by tracing it with their fingers.
  She felt Molly's tiny fingers gently tracing her necklace.
  Yohanna's fingers traced a silver crescent mark on the babe's forehead and in that brief moment Yohanna recognized her.
  My hand went automatically to my own neck, my soft fingers tracing the violet spirals adorning my pale back.
  She paused, staring at the back, one finger gently tracing the black rune that appeared to have been burned into it.
  By the time it registered in my mind I was tracing the ugly teal tiles with my fingernail.
  His small face flushed with delight, his finger tracing the print of the title.
3. 1.3 Take (a particular path or route)
  沿（特定路径）走
  a tear traced a lonely path down her cheek
  一滴泪珠孤寂地滑下她的脸颊。
  Example sentencesExamples
  He lay back on the mattress, looking up at the ceiling, as the single tear tracing down his cheeks was lost among the sea of swelling purple and black.
  Day after day I trace a pleasant, safe path into and out of nice little towns and villages, along soft verged roads and through gentle, rolling landscapes down to a calm sea.
  A lone tear traced its path down Serena's face as she set off into the forest, holding Gideon's hand tightly.
  The trajectory is the path traced by the center of gravity of the projectile from the origin to the level point.
  A single tear traced its course down her cheek and dropped softly to be absorbed by the wood.
  Last year Toti and the chef traced the route Giffords planned to take and visited local farmers' markets to talk directly to farmers in order to ensure the circus kitchen was fully stocked.
  A narrow stance, where the rear, downhill skate nearly traces the same path as the lead skate, makes it easier to steer them across and if necessary, up the hill to cut short your run.
  I watched in horror as he shivered, streams of tears tracing paths through the dust on his cheeks.
  A lonely tear traced a path much traveled down her cheek, but she wiped it away.
  More tears fell from her eyes and traced the preceding paths of tears.
  The Sun crosses the celestial equator from north to south as it traces its apparent annual path against the background of stars.
  Debussy's quartet moves like a snake through the forest, tracing an unpredictable, yet in hindsight inevitable, path.
  I screamed, tears tracing paths down my cheeks.
  It is a scramble, but it's not difficult and, if the crest is too airy for you, it's easy enough to trace a less exposed route on the east side of the ridge.
  Deirdre murmured, a tear tracing a path down her cheek, from sympathy, or from the bruises Alana was probably inflicting, he had no idea.
  She turned her head away, the tears beginning to trace paths through the thin layer of sand coating her cheeks.
  A mounting swell of emotion crested in his soul, then broke like a storm-tossed wave on the shore of his heart, and he wept, silvery tears tracing down his pale cheeks.
  The spaceship traced out a complex path across the desk, leaving a faint red screw-thread line floating in the air.
  Tears traced a familiar path down her dirty face.
  Viewers follow her progression slowly as she bides her time and moves through life confident of the path she is tracing.
2Copy (a drawing, map, or design) by drawing over its lines on a superimposed piece of transparent paper.
映描，描摹
Example sentencesExamples
- We made a mosaic of the photographs covering each survey zone, and then we traced a new base map off the composite image.
- The implication of Pennell's comment is that Vermeer might have copied or traced the outlines of an image and in this way obtained relative sizes for the objects depicted.
- If you are not confident in your drawing skills, you may want to use a piece of tracing paper and trace the image you would to place on the rubber stamp.
- This silhouette or ‘side view’ became a pattern from which a second, identical piece could be traced and cut out.
- With a pencil, draw or trace your preferred image onto the paper.
- So I used the box to trace out a heart-shaped piece of paper and wrote a Valentine's note to my teacher.
- In this instance, I encourage them to trace the drawing or part of it on tracing paper.
- Making clones of clones is like tracing a master painting through thin paper and expecting the copy to appear just as perfect as the original.
- Neither the original nor the projected copy have been traced.
- I had prepared a template for two portraits, which they traced onto their paper.
- This will help you decide what piece to trace first.
- Using graphite paper, they traced their portrait onto the map pieces.
- On butcher paper, trace the outline of the chair seat, then add 1 inch around all sides.
- Last, the sketch was held firmly against the watercolor paper, while the outline of the shoe design was gently traced over with pencil.
- Try tracing each plaited mat design, making sure you don't change direction at any intersection.
- The students can either start this with a new drawing, trace the one they already made or even photocopy the first one to save time.
- They first drew their portrait on paper before tracing the sketch on to the fabric.
- When the colored pieces had all been traced, students used high-gloss polyurethane to paint both sides of the construction paper.
- Then, using a light table, students traced their enlarged drawings onto good student quality watercolor paper.
- Between the cups, the center band or center front piece can be traced while still attached to the other half of the bra.
Synonyms
copy, reproduce, go over, draw over, draw the lines of
1. 2.1 Draw (a pattern or line), especially with one's finger or toe.
  （尤指用手指、脚趾）画（图，线）
  Example sentencesExamples
  Her hand moved over the sand slowly, tracing out strange patterns he couldn't distinguish.
  His finger traced a light circle around the wound.
  His hand gripped the hilt of his sword, the blade drawn but down so the point traced a line in the snow.
  She dipped her hand in the fountain, her fingers tracing lazy eights.
  Dust had collected on the tube's surface, turning Nick's finger a dark gray once he ran his finger across it, tracing a clear streak across the cloudy tube.
  Now, with your finger, trace a few quick lines in the heap, imposing some sort of visual rhythm.
  I knew where his hands were on my back, I could feel the patterns he was tracing with his fingers, where my hands were behind his neck, the fireworks exploding in my head.
  I started tracing a weird, abstract pattern of something or other on her window that had fogged in the cold afternoon.
  My finger traced a smiley face onto one of the condensation-covered windows of Matt's car as it pulled onto the grass that was my grandmother's driveway.
  He realised for the first time that his left arm had wrapped around her other side to hold her in an embrace, and that his fingers were tracing small circles over her stomach.
  Sighing, Jeff looked downward, his fingers tracing out a pattern on the counter.
  She lay in his arms, her head resting on his chest, her fingers tracing random, abstract patterns on his chest.
  He reached up with one dirty finger, tracing a tiny smile in the fog he had made.
2. 2.2 Give an outline of.
  勾画出轮廓，描绘
  the article traces out some of the connections between education, qualifications, and the labor market
  这篇文章勾勒出教育，资格及劳动力市场之间的某些联系。
  Example sentencesExamples
  Figure 6.3 is a useful alternative way of looking at this issue since it traces out combinations of prices for the two markets which yield the same levels of consumer surplus or profits.

nountrāstreɪs

1A mark, object, or other indication of the existence or passing of something.
痕迹，踪迹
remove all traces of the old adhesive
除去所有旧的粘合剂留下的痕迹。
the aircraft disappeared without trace
飞机消失得无影无踪。
Example sentencesExamples
- Kelly takes pains to disguise them, to remove all traces of expression.
- A gambler would probably ask how many zeroes need to be added to the donation for all traces of morality to disappear.
- But after she underwent chemotherapy, minor surgery and radiotherapy, all traces of the tumour disappeared.
- It has written to all the parties to warn them to remove all traces of the posters within the allotted timeframe and said some local authorities are offering a recycling service to encourage the process.
- Following the inspector's decision, Mr Crawford has six months to remove all traces of the extension.
- The building of the Bow flyover removed all traces of the old bridge, and the River Lea is now barely visible beside the dual carriageway beneath.
- Next my face was cleansed to remove impurities and all traces of make-up.
- In this case, it removes any traces of sympathy I might have had.
- Today, they had disappeared without a trace, not even in evidence on a remainder table.
- This is further refined by carbon filtration to remove any traces of molasses before crystallization.
- Gold's faster-paced songs had a vacant way of flowing through you and leaving no residual traces of their passing.
- This step stimulates the circulation, reduces oiliness, helps to refine the pores and skin texture, and removes the last traces of grease, dead cells and grime, and firms the skin.
- Is it they way they take previously nice pubs and turn them into standardised bright yellow tackfests, thus removing all traces of character and individuality?
- While the vast majority of films disappeared without a trace, a few ones survived the passage of time and retained their appeal.
- Remove all traces of a normal childhood, market him well and watch as he rises to superstardom.
- It was just this cleansing oil that's supposed to remove all traces of makeup so you are ready to go sleep with no risk of clogged pores.
- The pistol was cleaned with liberal applications of Crud Cutter until there were no traces of old lube remaining.
- Remove remaining traces of wax with a cloth moistened with mineral spirits (paint thinner) or cream furniture wax.
- Surely our leaders would be better engaged to remove all traces of film music from our holy places rather than chasing female marathon runners.
- But I think that even if I get rid of all visible traces, that mark of vulnerability that he's left on my home will remain for a long time to come.
Synonyms
vestige, sign, mark, indication, suggestion, evidence, clue
trail, track, spoor, marks, tracks, prints, imprints, footprints, footmarks, footsteps
1. 1.1 A line or pattern displayed by an instrument using a moving pen or a luminous spot on a screen to show the existence or nature of something that is being investigated.
  描记线，描记图
  Example sentencesExamples
  A direct writing electrocardiograph was attached, and I was offered the trace.
  Computer analysis of the trace is used to retrieve the spectral phase of the input pulse (a).
  Objective responses are recorded on a polygraph trace.
  In this instance, 10 traces were recorded simultaneously, in real time (only one trace is shown in the figure).
  The traces were recorded at different voltages.
  The consensus model presented here is derived from the results of analyzing only six traces recorded in response to a single perturbation.
  A total of 16.4 million DNA sequencing traces were processed using the pipeline depicted in Figure 1.
  Only recently have correlators become available that can also record the intensity traces.
  Baxter must now wait to see if the IOC will agree to a second test to establish the nature of the trace detected.
  It is a trace of the electrical activity of the human brain.
  The duration of the stimulus presentation was synchronized with the refresh traces of the monitor.
  During recognition, the probe accesses the traces of all studied items in parallel.
  Sequencing traces were processed using Sequencher (Gene Codes, Ann Arbor, MI).
  It records the trace of that one-minute or twenty seconds - which can seem very long - of standing face to face with another person.
  Fig.2 A shows typical current traces recorded for synaptophysin channels.
  When the Bug detects Mr. Grout, we expect to see spikes in the neural traces displayed on the lower half of the monitor.
2. 1.2 A physical change in the brain presumed to be caused by a process of learning or memory.
  （大脑上的学习或记忆）痕迹，印迹
  Example sentencesExamples
  Mean familiarity across all traces in memory indexes the likelihood that a match response is elicited.
  The dim light makes the figures in the background literally hard to see, as if they were fleeting traces of memory, just beyond the viewer's grasp.
  In addition to encoding stimulus intensity information into the episodic trace, it is likely that response information is encoded.
  Greg Edmonson's fractured landscapes show traces of memory that linger as layers within the spaces of our mind.
  This allows us to assess whether response information is included in the episodic trace, as has been suggested by Neill.
  Remote traces of their memory still seemed to exist somewhere in me.
  You dilute the active ingredient down till there's just a trace or memory, an essence - so it's the vibration of the flower that's working.
  It's now possible to map music's traces in the brain, study its impact on the immune system, and listen to the songs of black holes and living cells.
  They came to him evanescently, and left without leaving a trace in his memory - so brief and so quick.
  But of course, traces of his memory still lingered in the back of her head, just waiting to be re-awakened.
  Maintaining a large number of memory traces over long time periods has biological costs, which might be greater than the costs of allowing some traces to deteriorate.
  Commitment to memory or a given past is weak if its physical trace is planned to be removable and possibly replaced.
  According to models of episodic memory, contextual similarity is a driving force in influencing the probability of the retrieval of an episodic trace.
  Yet they remain as traces in the memory of country.
  Reconstruction of the mental trace in a complex process, after the fact, is a major challenge as few realize.
  Vague traces of memory returned to her with the rush-slap of waves against the sides of the boat and the pregnant silence of the company.
  The palace at Versailles was for Louis a haunted house in which spectres of his great-grandfather mingled with the memories and traces of his lost loved ones.
2A very small quantity, especially one too small to be accurately measured.
微量，少许（尤指太少无法精确量算）
his body contained traces of amphetamines
他身体里有微量安非他明。
as modifier trace quantities of PCBs
微量多氯化联苯。
Example sentencesExamples
- In response to revisionist charges, they tested the gas chamber walls for residual traces of cyanide gas but found none.
- Cadmium is found in all soils in at least trace quantities.
- An autopsy showed high levels of carbon monoxide in her blood as well as traces of amphetamines.
- The datolite from this locality also showed traces of platinum but in insufficient quantities to be the coloring agent.
- The hope is that someday people could wear a badge that would turn a color or make a noise when an specific nerve agent is present in trace quantities.
- Both the very high residual sugar and the trace materials secreted by the botrytis into the juice inhibit fermentation.
- The machines get their name because they blast a ‘puff’ of air over a passenger, and the sample is then analyzed for traces of explosives residue.
- But finally the state enforced better emissions standards, and the talc disappeared, except for traces here and there.
- A urine sample contained traces of the drug and Norton faces a six months ban at a disciplinary hearing.
- It'll go away in time, about the same time as you stop leaving traces of explosives residue about the place.
- When it comes to beating a drug test, there are basically three approaches: supply a fake sample, mask drug traces or hold them all in.
- But current studies show that, ingested in the trace amount found in Hinkley's water, or in food, it's harmless.
- Ammonia, for example, is present in trace quantities, yet it is considered to be essential in maintaining soils at a pH of around eight, that is, optimal for sustaining life.
- Each pit can hold a trace quantity of a chemical that reacts to a certain protein found in the blood.
- The dogs are trained to find blood-stained weapons, clothing and property, miniscule traces of blood and body fluid.
- Fairweather suggests this may point towards incoming prisoners changing the type of drugs they use from cannabis, which leaves traces in the body for a long time, to heroin, which is quickly flushed from the body.
- A trace amount of mercury is more than the body needs.
- If homeopathic theory was correct, the trace amounts of caffeine in decaff ought to have me bouncing off the ceiling.
- In the early days of DNA testing, samples had to be over a certain size for scientists to work with them, but now the smallest trace of body fluid or even skin flakes can provide a profile.
- As science becomes better at measuring small amounts of trace chemicals that are potential carcinogens, the zero risk approach is increasingly restrictive.
1. 2.1 A slight indication or barely discernible hint of something.
  丝毫；勉强可以发现的痕迹
  just a trace of a smile
  仅是一丝微笑。
  Example sentencesExamples
  But I could see faint traces of a smile starting to appear.
  A trace of sadness was barely audible in Cattia's flat voice, perhaps such a small sliver of one that only Tania really could pick it up.
  I could hear the traces of a wistful smile in his voice.
  There is a faint trace of a smile, but he does not flinch: whatever the honorary boyo's faults, he is unlikely to be bought with a knighthood.
  Josh's breathing grew shallow and a single tear dropped from his eye, but I could see the traces of the smile I loved so much beginning on his face.
  Any trace of a smile that I had on my face at that time fell.
  He may be a little world-weary, but behind the half-beard and the straggly locks there's the faintest trace of a smile.
  She rolled her eyes, but a trace of a smile graced her lips.
  Zach shrugged, the faintest traces of a smile appearing on his lips.
  Michan thought he saw the traces of a smile in the Commander's eyes.
  Her raised chin and an ‘upside-down smile’ reveal traces of disgust, anger, and sadness.
  Butler is softly spoken with a trace of an Edinburgh burr still discernible in her gentle Canadian accent.
  Gregory smiled, the traces of sadness slowly vanishing.
  The trace of a smile flickered across head coach Wu Jingui's face.
  ‘Thanks,’ she said, looking flustered, but I noted that her lips held the traces of a smile.
  So he buckled right in with the trace of a grin on his face.
  The boy turned and walked back into the woods, then paused and turned back towards Kevin, all former traces of a smile replaced by a grim anger.
  Alex smiled, hiding traces of bitterness from her face.
  ‘You're always damned by the exception,’ Hill says with the slightest trace of a smile.
  It is a tribute to him that there is barely a trace of tedium in a performance lasting more than four hours.
  Synonyms
  bit, spot, speck, touch, hint, suggestion, suspicion, nuance, intimation
3A procedure to investigate the source of something, such as the place from which a telephone call was made, or the origin of an error in a computer program.
（确定来电话者或计算机程序里确定故障源的）跟踪
Example sentencesExamples
- Witnesses took the number of the car and police conducted a trace on the vehicle.
- In the beginning of the film, Trinity is on the phone and we see the computer doing a telephone trace.
4A line which represents the projection of a curve or surface on a plane or the intersection of a curve or surface with a plane.
交线，迹线，轨迹
Example sentencesExamples
- The sheets are bilobed about a median furrow, visible in both vertical and horizontal sections, and form straight to gently curved, cross-cutting traces.
- The axis of the trace is curved slightly to the left.
- The thick black curve of Fig.2 illustrates representative traces of tension versus time.
5North American West Indian A beaten path or small road; a track.
〈西印度，美〉踏出来的小路，小径；小道
Example sentencesExamples
- Path was synonymous with trace, another invaluable gift that pioneers used to penetrate the otherwise impassable.
- S'sahr barked an order and there were groans, but the troopers spread out keeping eyes open for any traces or tracks.
- Here, however, it came to be another old and enduring track through otherwise treacherous and disorienting terrain, a variation of path and trace.
6Mathematics
The sum of the elements in the principle diagonal of a square matrix.
〔数〕迹
Example sentencesExamples
- This paper is more than an extension, however, for in it he used matrices, in particular the trace of a matrix, to greatly simplify the formulas he had presented in his 1926 paper.
- There is a clue to the way neural circuits control the disruptive forces of chaos in the trace in Figure 3.
- The sum of the eigenvalues is the trace of this matrix and it is sometimes called ‘total variance.’

Origin

Middle English (first recorded as a noun in the sense ‘path that someone or something takes’): from Old French trace (noun), tracier (verb), based on Latin tractus (see tract).

trace²

nountrāstreɪs

Each of the two side straps, chains, or ropes by which a horse is attached to a vehicle that it is pulling.
挽绳，缰绳
Example sentencesExamples
- Ales broke off in mid-explanation to dive into the crowd, reappearing clasping a handkerchief waving teenage girl, and yoking her into the cart's rope traces.
- The horses pulling the carriage suddenly took fright for no apparent reason, snapped the traces and bolted off, startling both the hosts and their guest of honour.

Origin

Middle English (denoting a pair of traces): from Old French trais, plural of trait (see trait).

词汇	trace
释义	trace¹ verb treɪstreɪs [with object] 1Find or discover by investigation. （通过调查）找到，发现 police are trying to trace a white van seen in the area 警方正设法查找曾在此地区出现的白色货车。 Example sentencesExamples Detectives eventually traced Young, who was living in Glasgow with a wife and children. Skipton detectives have told how they launched their biggest ever child pornography investigation to trace a Cross Hills man who posted images of abuse on the internet. Despite an extensive investigation, the parents have not been traced and the circumstances of the birth remain a matter of speculation. What was dismissed as a ‘third-rate burglary’ was eventually traced to the White House. Now Lloyd and Debbie Peters, who moved to Australia from Hockley, are calling for help in tracing the white Havenese dog who ran off while being groomed. Detectives in Salford are trying to trace the two men in a white van who tried to abduct the boy from the street in Little Hulton on Thursday evening. Police traced the stolen VW Polo and discovered it had been stolen from a house in Park Road, Prestwich. Police have so far been unable to trace the white Conway trailer, but a cheque from the Donnes has gone some way to lifting the youngster's spirits. Police also say they want help in tracing a Bedford van which was stolen from Abney Close in the Heeley area of Sheffield. Police are trying to trace anyone the teenager may have spoken to on line and say he may have used the name DJ or possibly Dee Jay. He also warned bogus account holders who have not yet been contacted by Revenue that tax officials are conducting further investigations to trace all such persons. Inquires conducted at the time resulted in a sighting of a man, who was never traced but later eliminated from the investigation. Gardaí are also looking to trace a white Subaru car, which was sighted around Borris at the time. The occupants of the BMW have never been traced despite an extensive police investigation. They are also extremely anxious to trace a Bedford van, believed to have been stolen from the Heeley area of Sheffield only hours before the murder was committed. Police are trying to trace a white Ford Escort about ten years old in connection with a spate of thefts from vehicles in the Marlborough and Pewsey areas on Saturday. Trolleys were loaded with boxes of cash and hidden under rubbish before being smuggled out of the bank into a waiting white transit van that has still not been traced. Detectives want to trace a blue Fluid denim jacket and a pair of black Rockwood shoes left in the car, which may have been thrown away or given to someone. Detectives are keen to trace a white camper van and its occupants. She gave a false name and address but was traced when the details did not match those held by the DVLA. Synonyms track down, find, discover, detect, unearth, uncover, turn up, hunt down, dig up, ferret out, run to ground follow, pursue, trail, shadow, stalk, dog find the source of, find the origins of, find the roots of, follow to its source, source 1.1 Find or describe the origin or development of. 追溯，追究，查考 Bob's book traces his flying career with the RAF 鲍勃的书追溯了他在英国皇家空军的飞行生涯。 Example sentencesExamples On the contrary much of what is taken to be so distinctive about the Victorians can be traced back to eighteenth-century developments that have featured in this volume. Its origin has been traced back as far as 1856 by noted historian John Ridge. Debates over who is the best ball-flyer, who gets the most sleep, and who eats the most dog, can be traced to the origins of our profession. The origins of this state of laws can be traced to the development of feudalism and the consequent horizontal and vertical associations that were created in the British body politic. The difference this time around can be traced to four new developments. The origins of the pudding can be traced to the commercial developments of the city between 1685 and 1825. Their high performance can be traced to two developments. The history of these games can be traced to the early development of gaming on PCs, consoles, and various other platforms. Its origins can be traced back to as 1085 when King Alfonso VI of Castle reigned here. Although these developments are unexpected, their origins can be traced to China's 1996 military exercises. The computer, one of the greatest discoveries of all times, was born in his head, the head of a man whose origins can be traced to Bulgaria. It is still an ethos that is found in contemporary pubs, particularly in rural and remote regions, yet its cultural origins can be traced back to colonial mores. Again, its origins can be traced to Fagen's school days. Like most of the terms that refer to major conceptual anchors of the western intellectual tradition, its origins may be traced to classical antiquity. Twenty-one Presidents can be traced back to seventeenth-century origins among New England colonists. Each book does a splendid job of tracing the origins and development of a religious doctrine and its impact on the mundane world. Considering this, it is not surprising that the dance's origins can be traced back to the roaring twenties - the time of the flappers and the first Miss America contest. This was the most intricate painting of the show, as well as the most recent, and its development could be traced in the predecessors that hung around it. There were some 20 years between these commercial clunkers, yet the same thread of dull-wittedness can be traced through the origins of both. This is without question the first book to trace the origins of black baseball's institutional development. 1.2 Follow or mark the course or position of (something) with one's eye, mind, or finger. 追踪，跟踪 through the binoculars, I traced the path I had taken the night before 我用双筒望远镜追踪了昨晚走的路。 Example sentencesExamples By the time it registered in my mind I was tracing the ugly teal tiles with my fingernail. She stared at it, her fingers tracing the indents were small crystal diamonds filled the interior lining. She paused, staring at the back, one finger gently tracing the black rune that appeared to have been burned into it. He wiped a bead of water off my lip, his strong fingers tracing my lips for a moment as he got closer. It had claw marks across its wooden panels, and when I traced them with my finger I decided that they were far too big to be from some kind of animal. He was gazing out the window and his fingers were tracing the scar on his cheek. My hand went automatically to my own neck, my soft fingers tracing the violet spirals adorning my pale back. She studied them with her own fingers, tracing each scar and noticing his gaze through her eyelashes. I felt what I imagined to be someone's fingers tracing the outline of my face. His finger traced the institute on the map, and the trail to the rest of the Yellow society. Panama is absent-mindedly traced by someone's finger. His fingers trace the headlines and the picture captions; then he gives up and his lips cease to move. He reached out his hand and his fingers traced her laughing smile. Slowly realization dawned onto him and he suddenly wrapped his own arms around her waist, a single finger tracing her spine upwards and then back downward again. She felt Molly's tiny fingers gently tracing her necklace. His fingers traced the sides of my face, like a child would who was examining the skin of a grandparent. There are people who can ‘read’ what a CD's print letters say by tracing it with their fingers. Yohanna's fingers traced a silver crescent mark on the babe's forehead and in that brief moment Yohanna recognized her. Dragging her left hand up his chest flirtatiously, Jessie stopped at his lips, softly tracing them with her fingers. His small face flushed with delight, his finger tracing the print of the title. 1.3 Take (a particular path or route) 沿（特定路径）走 a tear traced a lonely path down her cheek 一滴泪珠孤寂地滑下她的脸颊。 Example sentencesExamples Viewers follow her progression slowly as she bides her time and moves through life confident of the path she is tracing. I watched in horror as he shivered, streams of tears tracing paths through the dust on his cheeks. A lonely tear traced a path much traveled down her cheek, but she wiped it away. He lay back on the mattress, looking up at the ceiling, as the single tear tracing down his cheeks was lost among the sea of swelling purple and black. A narrow stance, where the rear, downhill skate nearly traces the same path as the lead skate, makes it easier to steer them across and if necessary, up the hill to cut short your run. More tears fell from her eyes and traced the preceding paths of tears. She turned her head away, the tears beginning to trace paths through the thin layer of sand coating her cheeks. Tears traced a familiar path down her dirty face. Debussy's quartet moves like a snake through the forest, tracing an unpredictable, yet in hindsight inevitable, path. A lone tear traced its path down Serena's face as she set off into the forest, holding Gideon's hand tightly. Day after day I trace a pleasant, safe path into and out of nice little towns and villages, along soft verged roads and through gentle, rolling landscapes down to a calm sea. The Sun crosses the celestial equator from north to south as it traces its apparent annual path against the background of stars. The trajectory is the path traced by the center of gravity of the projectile from the origin to the level point. A mounting swell of emotion crested in his soul, then broke like a storm-tossed wave on the shore of his heart, and he wept, silvery tears tracing down his pale cheeks. Deirdre murmured, a tear tracing a path down her cheek, from sympathy, or from the bruises Alana was probably inflicting, he had no idea. Last year Toti and the chef traced the route Giffords planned to take and visited local farmers' markets to talk directly to farmers in order to ensure the circus kitchen was fully stocked. A single tear traced its course down her cheek and dropped softly to be absorbed by the wood. I screamed, tears tracing paths down my cheeks. It is a scramble, but it's not difficult and, if the crest is too airy for you, it's easy enough to trace a less exposed route on the east side of the ridge. The spaceship traced out a complex path across the desk, leaving a faint red screw-thread line floating in the air. 2Copy (a drawing, map, or design) by drawing over its lines on a superimposed piece of transparent paper. 映描，描摹 trace a map of the world on to a large piece of paper Example sentencesExamples This will help you decide what piece to trace first. Then, using a light table, students traced their enlarged drawings onto good student quality watercolor paper. This silhouette or ‘side view’ became a pattern from which a second, identical piece could be traced and cut out. I had prepared a template for two portraits, which they traced onto their paper. With a pencil, draw or trace your preferred image onto the paper. They first drew their portrait on paper before tracing the sketch on to the fabric. On butcher paper, trace the outline of the chair seat, then add 1 inch around all sides. The implication of Pennell's comment is that Vermeer might have copied or traced the outlines of an image and in this way obtained relative sizes for the objects depicted. Using graphite paper, they traced their portrait onto the map pieces. So I used the box to trace out a heart-shaped piece of paper and wrote a Valentine's note to my teacher. The students can either start this with a new drawing, trace the one they already made or even photocopy the first one to save time. Last, the sketch was held firmly against the watercolor paper, while the outline of the shoe design was gently traced over with pencil. Between the cups, the center band or center front piece can be traced while still attached to the other half of the bra. We made a mosaic of the photographs covering each survey zone, and then we traced a new base map off the composite image. Neither the original nor the projected copy have been traced. When the colored pieces had all been traced, students used high-gloss polyurethane to paint both sides of the construction paper. Try tracing each plaited mat design, making sure you don't change direction at any intersection. Making clones of clones is like tracing a master painting through thin paper and expecting the copy to appear just as perfect as the original. In this instance, I encourage them to trace the drawing or part of it on tracing paper. If you are not confident in your drawing skills, you may want to use a piece of tracing paper and trace the image you would to place on the rubber stamp. Synonyms copy, reproduce, go over, draw over, draw the lines of draw, draw up, sketch, draft, outline, rough out, mark out, delineate, map, chart, record, indicate, show, depict 2.1 Draw (a pattern or line), especially with one's finger or toe. （尤指用手指、脚趾）画（图，线） she traced a pattern in the dirt with the toe of her shoe Example sentencesExamples She lay in his arms, her head resting on his chest, her fingers tracing random, abstract patterns on his chest. She dipped her hand in the fountain, her fingers tracing lazy eights. Now, with your finger, trace a few quick lines in the heap, imposing some sort of visual rhythm. He reached up with one dirty finger, tracing a tiny smile in the fog he had made. Dust had collected on the tube's surface, turning Nick's finger a dark gray once he ran his finger across it, tracing a clear streak across the cloudy tube. His finger traced a light circle around the wound. I knew where his hands were on my back, I could feel the patterns he was tracing with his fingers, where my hands were behind his neck, the fireworks exploding in my head. His hand gripped the hilt of his sword, the blade drawn but down so the point traced a line in the snow. Sighing, Jeff looked downward, his fingers tracing out a pattern on the counter. Her hand moved over the sand slowly, tracing out strange patterns he couldn't distinguish. My finger traced a smiley face onto one of the condensation-covered windows of Matt's car as it pulled onto the grass that was my grandmother's driveway. I started tracing a weird, abstract pattern of something or other on her window that had fogged in the cold afternoon. He realised for the first time that his left arm had wrapped around her other side to hold her in an embrace, and that his fingers were tracing small circles over her stomach. 2.2 Give an outline of. 勾画出轮廓，描绘 the article traces out some of the connections between education, qualifications, and the labour market 这篇文章勾勒出教育，资格及劳动力市场之间的某些联系。 Example sentencesExamples Figure 6.3 is a useful alternative way of looking at this issue since it traces out combinations of prices for the two markets which yield the same levels of consumer surplus or profits. noun treɪstreɪs 1A mark, object, or other indication of the existence or passing of something. 痕迹，踪迹 remove all traces of the old adhesive 除去所有旧的粘合剂留下的痕迹。 mass noun the aircraft disappeared without trace 飞机消失得无影无踪。 Example sentencesExamples Remove remaining traces of wax with a cloth moistened with mineral spirits (paint thinner) or cream furniture wax. A gambler would probably ask how many zeroes need to be added to the donation for all traces of morality to disappear. It has written to all the parties to warn them to remove all traces of the posters within the allotted timeframe and said some local authorities are offering a recycling service to encourage the process. But I think that even if I get rid of all visible traces, that mark of vulnerability that he's left on my home will remain for a long time to come. It was just this cleansing oil that's supposed to remove all traces of makeup so you are ready to go sleep with no risk of clogged pores. Remove all traces of a normal childhood, market him well and watch as he rises to superstardom. The pistol was cleaned with liberal applications of Crud Cutter until there were no traces of old lube remaining. Following the inspector's decision, Mr Crawford has six months to remove all traces of the extension. This is further refined by carbon filtration to remove any traces of molasses before crystallization. Today, they had disappeared without a trace, not even in evidence on a remainder table. While the vast majority of films disappeared without a trace, a few ones survived the passage of time and retained their appeal. Surely our leaders would be better engaged to remove all traces of film music from our holy places rather than chasing female marathon runners. Gold's faster-paced songs had a vacant way of flowing through you and leaving no residual traces of their passing. The building of the Bow flyover removed all traces of the old bridge, and the River Lea is now barely visible beside the dual carriageway beneath. This step stimulates the circulation, reduces oiliness, helps to refine the pores and skin texture, and removes the last traces of grease, dead cells and grime, and firms the skin. Next my face was cleansed to remove impurities and all traces of make-up. Is it they way they take previously nice pubs and turn them into standardised bright yellow tackfests, thus removing all traces of character and individuality? Kelly takes pains to disguise them, to remove all traces of expression. In this case, it removes any traces of sympathy I might have had. But after she underwent chemotherapy, minor surgery and radiotherapy, all traces of the tumour disappeared. Synonyms vestige, sign, mark, indication, suggestion, evidence, clue remains, remnant, relic, survival ghost, echo, memory trail, track, spoor, marks, tracks, prints, imprints, footprints, footmarks, footsteps 1.1 A line or pattern displayed by an instrument to show the existence or nature of something which is being recorded or measured. 描记线，描记图 Example sentencesExamples Objective responses are recorded on a polygraph trace. Baxter must now wait to see if the IOC will agree to a second test to establish the nature of the trace detected. In this instance, 10 traces were recorded simultaneously, in real time (only one trace is shown in the figure). It is a trace of the electrical activity of the human brain. Computer analysis of the trace is used to retrieve the spectral phase of the input pulse (a). The duration of the stimulus presentation was synchronized with the refresh traces of the monitor. Only recently have correlators become available that can also record the intensity traces. Fig.2 A shows typical current traces recorded for synaptophysin channels. It records the trace of that one-minute or twenty seconds - which can seem very long - of standing face to face with another person. During recognition, the probe accesses the traces of all studied items in parallel. A direct writing electrocardiograph was attached, and I was offered the trace. Sequencing traces were processed using Sequencher (Gene Codes, Ann Arbor, MI). A total of 16.4 million DNA sequencing traces were processed using the pipeline depicted in Figure 1. The traces were recorded at different voltages. The consensus model presented here is derived from the results of analyzing only six traces recorded in response to a single perturbation. When the Bug detects Mr. Grout, we expect to see spikes in the neural traces displayed on the lower half of the monitor. 1.2 A physical change in the brain presumed to be caused by a process of learning or memory. （大脑上的学习或记忆）痕迹，印迹 Example sentencesExamples But of course, traces of his memory still lingered in the back of her head, just waiting to be re-awakened. In addition to encoding stimulus intensity information into the episodic trace, it is likely that response information is encoded. Reconstruction of the mental trace in a complex process, after the fact, is a major challenge as few realize. Greg Edmonson's fractured landscapes show traces of memory that linger as layers within the spaces of our mind. Remote traces of their memory still seemed to exist somewhere in me. The dim light makes the figures in the background literally hard to see, as if they were fleeting traces of memory, just beyond the viewer's grasp. Yet they remain as traces in the memory of country. The palace at Versailles was for Louis a haunted house in which spectres of his great-grandfather mingled with the memories and traces of his lost loved ones. It's now possible to map music's traces in the brain, study its impact on the immune system, and listen to the songs of black holes and living cells. You dilute the active ingredient down till there's just a trace or memory, an essence - so it's the vibration of the flower that's working. Commitment to memory or a given past is weak if its physical trace is planned to be removable and possibly replaced. This allows us to assess whether response information is included in the episodic trace, as has been suggested by Neill. Vague traces of memory returned to her with the rush-slap of waves against the sides of the boat and the pregnant silence of the company. They came to him evanescently, and left without leaving a trace in his memory - so brief and so quick. According to models of episodic memory, contextual similarity is a driving force in influencing the probability of the retrieval of an episodic trace. Maintaining a large number of memory traces over long time periods has biological costs, which might be greater than the costs of allowing some traces to deteriorate. Mean familiarity across all traces in memory indexes the likelihood that a match response is elicited. 2A very small quantity, especially one too small to be accurately measured. 微量，少许（尤指太少无法精确量算） his body contained traces of amphetamines 他身体里有微量安非他明。 as modifier trace quantities of PCBs 微量多氯化联苯。 Example sentencesExamples A urine sample contained traces of the drug and Norton faces a six months ban at a disciplinary hearing. When it comes to beating a drug test, there are basically three approaches: supply a fake sample, mask drug traces or hold them all in. But finally the state enforced better emissions standards, and the talc disappeared, except for traces here and there. In the early days of DNA testing, samples had to be over a certain size for scientists to work with them, but now the smallest trace of body fluid or even skin flakes can provide a profile. Both the very high residual sugar and the trace materials secreted by the botrytis into the juice inhibit fermentation. The machines get their name because they blast a ‘puff’ of air over a passenger, and the sample is then analyzed for traces of explosives residue. The hope is that someday people could wear a badge that would turn a color or make a noise when an specific nerve agent is present in trace quantities. A trace amount of mercury is more than the body needs. If homeopathic theory was correct, the trace amounts of caffeine in decaff ought to have me bouncing off the ceiling. The dogs are trained to find blood-stained weapons, clothing and property, miniscule traces of blood and body fluid. An autopsy showed high levels of carbon monoxide in her blood as well as traces of amphetamines. Each pit can hold a trace quantity of a chemical that reacts to a certain protein found in the blood. But current studies show that, ingested in the trace amount found in Hinkley's water, or in food, it's harmless. Cadmium is found in all soils in at least trace quantities. It'll go away in time, about the same time as you stop leaving traces of explosives residue about the place. As science becomes better at measuring small amounts of trace chemicals that are potential carcinogens, the zero risk approach is increasingly restrictive. Fairweather suggests this may point towards incoming prisoners changing the type of drugs they use from cannabis, which leaves traces in the body for a long time, to heroin, which is quickly flushed from the body. In response to revisionist charges, they tested the gas chamber walls for residual traces of cyanide gas but found none. Ammonia, for example, is present in trace quantities, yet it is considered to be essential in maintaining soils at a pH of around eight, that is, optimal for sustaining life. The datolite from this locality also showed traces of platinum but in insufficient quantities to be the coloring agent. 2.1 A barely discernible indication of something. 丝毫；勉强可以发现的痕迹 just a trace of a smile 仅是一丝微笑。 Example sentencesExamples ‘Thanks,’ she said, looking flustered, but I noted that her lips held the traces of a smile. Any trace of a smile that I had on my face at that time fell. He may be a little world-weary, but behind the half-beard and the straggly locks there's the faintest trace of a smile. Butler is softly spoken with a trace of an Edinburgh burr still discernible in her gentle Canadian accent. The trace of a smile flickered across head coach Wu Jingui's face. Alex smiled, hiding traces of bitterness from her face. ‘You're always damned by the exception,’ Hill says with the slightest trace of a smile. There is a faint trace of a smile, but he does not flinch: whatever the honorary boyo's faults, he is unlikely to be bought with a knighthood. Gregory smiled, the traces of sadness slowly vanishing. Her raised chin and an ‘upside-down smile’ reveal traces of disgust, anger, and sadness. But I could see faint traces of a smile starting to appear. A trace of sadness was barely audible in Cattia's flat voice, perhaps such a small sliver of one that only Tania really could pick it up. So he buckled right in with the trace of a grin on his face. I could hear the traces of a wistful smile in his voice. Josh's breathing grew shallow and a single tear dropped from his eye, but I could see the traces of the smile I loved so much beginning on his face. She rolled her eyes, but a trace of a smile graced her lips. Michan thought he saw the traces of a smile in the Commander's eyes. The boy turned and walked back into the woods, then paused and turned back towards Kevin, all former traces of a smile replaced by a grim anger. It is a tribute to him that there is barely a trace of tedium in a performance lasting more than four hours. Zach shrugged, the faintest traces of a smile appearing on his lips. Synonyms bit, spot, speck, touch, hint, suggestion, suspicion, nuance, intimation trifle, drop, dash, tinge, tincture, streak, shred, crumb, fragment, shadow, whiff, breath, jot, iota informal smidgen, tad 3A procedure to investigate the source of something, such as the place from which a telephone call was made. （确定来电话者或计算机程序里确定故障源的）跟踪 we've got a trace on the call Example sentencesExamples Witnesses took the number of the car and police conducted a trace on the vehicle. In the beginning of the film, Trinity is on the phone and we see the computer doing a telephone trace. 4A line which represents the projection of a curve or surface on a plane or the intersection of a curve or surface with a plane. 交线，迹线，轨迹 Example sentencesExamples The thick black curve of Fig.2 illustrates representative traces of tension versus time. The sheets are bilobed about a median furrow, visible in both vertical and horizontal sections, and form straight to gently curved, cross-cutting traces. The axis of the trace is curved slightly to the left. 5North American West Indian A path or track. Example sentencesExamples S'sahr barked an order and there were groans, but the troopers spread out keeping eyes open for any traces or tracks. Path was synonymous with trace, another invaluable gift that pioneers used to penetrate the otherwise impassable. Here, however, it came to be another old and enduring track through otherwise treacherous and disorienting terrain, a variation of path and trace. 6Mathematics The sum of the elements in the principal diagonal of a square matrix. 〔数〕迹 Example sentencesExamples This paper is more than an extension, however, for in it he used matrices, in particular the trace of a matrix, to greatly simplify the formulas he had presented in his 1926 paper. The sum of the eigenvalues is the trace of this matrix and it is sometimes called ‘total variance.’ There is a clue to the way neural circuits control the disruptive forces of chaos in the trace in Figure 3. Derivatives traceability nountreɪsəˈbɪlɪtiˌtreɪsəˈbɪlədi He said sheep tagging and traceability will assist in resolving illegal movements but the reality is that tagging in itself will not apprehend and root out rogue dealers. They include traceability, safe farm practices, prudent use of antibiotics and chemicals, pasteurisation and meat contamination. Minister Joe Walsh described NSIS as a most important development in progressing animal identification and traceability in Ireland. Example sentencesExamples Traceability will underpin all future food safety legislation. We need traceability and a surveillance system that ensures early recognition of a disease problem. Traceability is a fundamental requirement for organic certification. As the community is small, complete transparency and traceability is guaranteed. Traceability from field to plate is essential in today's consumer market. traceless adjective ˈtreɪsləsˈtreɪsləs No human tracker will be able to follow up the movement of this man's traceless passage. Example sentencesExamples Stories travel through the minds of those who receive them, and follow traceless, timeless paths unaccountable to rational means. They've found all thirty people, nameless and traceless! The next morning we learned of your seemingly traceless disappearance. With this experience, the traces of enlightenment are eliminated and a life of traceless enlightenment is limitlessly renewed. Origin Middle English (first recorded as a noun in the sense 'path that someone or something takes'): from Old French trace (noun), tracier (verb), based on Latin tractus (see tract¹). train from Middle English: Before railways were invented in the early 19th century, train followed a different track. Early senses included ‘a trailing part of a robe’ and ‘a retinue’, which gave rise to ‘a line of travelling people or vehicles’, and later ‘a connected series of things’, as in train of thought. To train could mean ‘to cause a plant to grow in a desired shape’, which was the basis of the sense ‘to instruct’. The word is from Latin trahere ‘to pull, draw’, and so is related to word such as trace (Middle English) originally a path someone is drawn along, trail (Middle English) originally in the sense ‘to tow’, tractor (late 18th century) ‘something that pulls', contract (Middle English) ‘draw together’, and extract (Late Middle English) ‘draw out’. Boys in particular have practised the hobby of trainspotting under that name since the late 1950s. Others ridicule this hobby and in Britain in the 1980s trainspotter, like anorak, became a derogatory term for an obsessive follower of any minority interest. Irvine Welsh's 1993 novel Trainspotting gave a high profile to the term. The title refers to an episode in which two heroin addicts go to a disused railway station in Edinburgh and meet an old drunk in a disused railway station who asks them if they are trainspotting. There are also other overtones from the language of drugs—track is an addicts' term for a vein, mainlining [1930s] for injecting a drug intravenously, and train for a drug dealer. Trainers were originally training shoes, soft shoes without spikes or studs worn by athletes or sports players for training rather than the sport itself. The short form began to replace the longer one in the late 1970s. Rhymes abase, ace, apace, backspace, base, bass, brace, case, chase, dace, efface, embrace, encase, enchase, enlace, face, grace, interlace, interspace, in-your-face, lace, mace, misplace, outface, outpace, pace, place, plaice, race, space, Thrace, upper case trace² noun treɪstreɪs Each of the two side straps, chains, or ropes by which a horse is attached to a vehicle that it is pulling. 挽绳，缰绳 Example sentencesExamples Ales broke off in mid-explanation to dive into the crowd, reappearing clasping a handkerchief waving teenage girl, and yoking her into the cart's rope traces. The horses pulling the carriage suddenly took fright for no apparent reason, snapped the traces and bolted off, startling both the hosts and their guest of honour. Phrases kick over the traces Become insubordinate or reckless. 挣脱羁绊，变得不服从，鲁莽 Example sentencesExamples I sense a certain aimlessness and confusion amongst those of us who keep kicking over the traces, I wonder if God isn't rebuking us for such a perversely inverted lack of grace. Anil's father went to the UK to study but ended up kicking over the traces and having his hair cut, which was tremendously rebellious for his community at the time. Never mind that you have learned something new, that you have kicked over the traces of your parents. Even when there is no intention to kick over the traces, the quiet understanding of compatibles offers a hint of forbidden pleasure. They're just kids doing what kids do, which is kick over the traces and test their independence. We were kicking over the traces, stepping into our own power and stepping out to get more. The rebel son is restless, longs to kick over the traces and seeks personal advancement. George is already kicking over the traces - spending too much, drinking too much, gambling too much and, as Amelia dare not admit to herself, consorting adulterously with other women. It was very hard aged 15, 16, 17, at a school like the Academy, at which a great number of my contemporaries were hereditary Tory, hereditary unionist, in their mentality, not to kick over the traces. Kapri is as charming as ever it was, the people as odd: everybody is very immoral, but fortunately not so dull as those who kick over the traces often are. Origin Middle English (denoting a pair of traces): from Old French trais, plural of trait (see trait). verb.1 noun.1 phr. trace¹ verbtrāstreɪs [with object] 1Find or discover by investigation. （通过调查）找到，发现 police are trying to trace a white van seen in the area 警方正设法查找曾在此地区出现的白色货车。 Example sentencesExamples Detectives are keen to trace a white camper van and its occupants. Detectives eventually traced Young, who was living in Glasgow with a wife and children. She gave a false name and address but was traced when the details did not match those held by the DVLA. Trolleys were loaded with boxes of cash and hidden under rubbish before being smuggled out of the bank into a waiting white transit van that has still not been traced. Skipton detectives have told how they launched their biggest ever child pornography investigation to trace a Cross Hills man who posted images of abuse on the internet. Gardaí are also looking to trace a white Subaru car, which was sighted around Borris at the time. Police are trying to trace a white Ford Escort about ten years old in connection with a spate of thefts from vehicles in the Marlborough and Pewsey areas on Saturday. Detectives want to trace a blue Fluid denim jacket and a pair of black Rockwood shoes left in the car, which may have been thrown away or given to someone. He also warned bogus account holders who have not yet been contacted by Revenue that tax officials are conducting further investigations to trace all such persons. Despite an extensive investigation, the parents have not been traced and the circumstances of the birth remain a matter of speculation. The occupants of the BMW have never been traced despite an extensive police investigation. What was dismissed as a ‘third-rate burglary’ was eventually traced to the White House. Police also say they want help in tracing a Bedford van which was stolen from Abney Close in the Heeley area of Sheffield. Detectives in Salford are trying to trace the two men in a white van who tried to abduct the boy from the street in Little Hulton on Thursday evening. Inquires conducted at the time resulted in a sighting of a man, who was never traced but later eliminated from the investigation. Police have so far been unable to trace the white Conway trailer, but a cheque from the Donnes has gone some way to lifting the youngster's spirits. Police traced the stolen VW Polo and discovered it had been stolen from a house in Park Road, Prestwich. They are also extremely anxious to trace a Bedford van, believed to have been stolen from the Heeley area of Sheffield only hours before the murder was committed. Police are trying to trace anyone the teenager may have spoken to on line and say he may have used the name DJ or possibly Dee Jay. Now Lloyd and Debbie Peters, who moved to Australia from Hockley, are calling for help in tracing the white Havenese dog who ran off while being groomed. Synonyms track down, find, discover, detect, unearth, uncover, turn up, hunt down, dig up, ferret out, run to ground find the source of, find the origins of, find the roots of, follow to its source, source 1.1 Find or describe the origin or development of. 追溯，追究，查考 Bob's book traces his flying career with the Marines 鲍勃的书追溯了他在英国皇家空军的飞行生涯。 Example sentencesExamples Their high performance can be traced to two developments. Debates over who is the best ball-flyer, who gets the most sleep, and who eats the most dog, can be traced to the origins of our profession. The origins of the pudding can be traced to the commercial developments of the city between 1685 and 1825. On the contrary much of what is taken to be so distinctive about the Victorians can be traced back to eighteenth-century developments that have featured in this volume. Considering this, it is not surprising that the dance's origins can be traced back to the roaring twenties - the time of the flappers and the first Miss America contest. Like most of the terms that refer to major conceptual anchors of the western intellectual tradition, its origins may be traced to classical antiquity. The difference this time around can be traced to four new developments. The computer, one of the greatest discoveries of all times, was born in his head, the head of a man whose origins can be traced to Bulgaria. The origins of this state of laws can be traced to the development of feudalism and the consequent horizontal and vertical associations that were created in the British body politic. Its origin has been traced back as far as 1856 by noted historian John Ridge. The history of these games can be traced to the early development of gaming on PCs, consoles, and various other platforms. Twenty-one Presidents can be traced back to seventeenth-century origins among New England colonists. Again, its origins can be traced to Fagen's school days. Although these developments are unexpected, their origins can be traced to China's 1996 military exercises. There were some 20 years between these commercial clunkers, yet the same thread of dull-wittedness can be traced through the origins of both. This was the most intricate painting of the show, as well as the most recent, and its development could be traced in the predecessors that hung around it. Its origins can be traced back to as 1085 when King Alfonso VI of Castle reigned here. This is without question the first book to trace the origins of black baseball's institutional development. Each book does a splendid job of tracing the origins and development of a religious doctrine and its impact on the mundane world. It is still an ethos that is found in contemporary pubs, particularly in rural and remote regions, yet its cultural origins can be traced back to colonial mores. 1.2 Follow or mark the course or position of (something) with one's eye, mind, or finger. 追踪，跟踪 through the binoculars, I traced the path I had taken the night before 我用双筒望远镜追踪了昨晚走的路。 Example sentencesExamples I felt what I imagined to be someone's fingers tracing the outline of my face. It had claw marks across its wooden panels, and when I traced them with my finger I decided that they were far too big to be from some kind of animal. He reached out his hand and his fingers traced her laughing smile. Panama is absent-mindedly traced by someone's finger. He wiped a bead of water off my lip, his strong fingers tracing my lips for a moment as he got closer. His finger traced the institute on the map, and the trail to the rest of the Yellow society. His fingers traced the sides of my face, like a child would who was examining the skin of a grandparent. She studied them with her own fingers, tracing each scar and noticing his gaze through her eyelashes. Slowly realization dawned onto him and he suddenly wrapped his own arms around her waist, a single finger tracing her spine upwards and then back downward again. Dragging her left hand up his chest flirtatiously, Jessie stopped at his lips, softly tracing them with her fingers. He was gazing out the window and his fingers were tracing the scar on his cheek. She stared at it, her fingers tracing the indents were small crystal diamonds filled the interior lining. His fingers trace the headlines and the picture captions; then he gives up and his lips cease to move. There are people who can ‘read’ what a CD's print letters say by tracing it with their fingers. She felt Molly's tiny fingers gently tracing her necklace. Yohanna's fingers traced a silver crescent mark on the babe's forehead and in that brief moment Yohanna recognized her. My hand went automatically to my own neck, my soft fingers tracing the violet spirals adorning my pale back. She paused, staring at the back, one finger gently tracing the black rune that appeared to have been burned into it. By the time it registered in my mind I was tracing the ugly teal tiles with my fingernail. His small face flushed with delight, his finger tracing the print of the title. 1.3 Take (a particular path or route) 沿（特定路径）走 a tear traced a lonely path down her cheek 一滴泪珠孤寂地滑下她的脸颊。 Example sentencesExamples He lay back on the mattress, looking up at the ceiling, as the single tear tracing down his cheeks was lost among the sea of swelling purple and black. Day after day I trace a pleasant, safe path into and out of nice little towns and villages, along soft verged roads and through gentle, rolling landscapes down to a calm sea. A lone tear traced its path down Serena's face as she set off into the forest, holding Gideon's hand tightly. The trajectory is the path traced by the center of gravity of the projectile from the origin to the level point. A single tear traced its course down her cheek and dropped softly to be absorbed by the wood. Last year Toti and the chef traced the route Giffords planned to take and visited local farmers' markets to talk directly to farmers in order to ensure the circus kitchen was fully stocked. A narrow stance, where the rear, downhill skate nearly traces the same path as the lead skate, makes it easier to steer them across and if necessary, up the hill to cut short your run. I watched in horror as he shivered, streams of tears tracing paths through the dust on his cheeks. A lonely tear traced a path much traveled down her cheek, but she wiped it away. More tears fell from her eyes and traced the preceding paths of tears. The Sun crosses the celestial equator from north to south as it traces its apparent annual path against the background of stars. Debussy's quartet moves like a snake through the forest, tracing an unpredictable, yet in hindsight inevitable, path. I screamed, tears tracing paths down my cheeks. It is a scramble, but it's not difficult and, if the crest is too airy for you, it's easy enough to trace a less exposed route on the east side of the ridge. Deirdre murmured, a tear tracing a path down her cheek, from sympathy, or from the bruises Alana was probably inflicting, he had no idea. She turned her head away, the tears beginning to trace paths through the thin layer of sand coating her cheeks. A mounting swell of emotion crested in his soul, then broke like a storm-tossed wave on the shore of his heart, and he wept, silvery tears tracing down his pale cheeks. The spaceship traced out a complex path across the desk, leaving a faint red screw-thread line floating in the air. Tears traced a familiar path down her dirty face. Viewers follow her progression slowly as she bides her time and moves through life confident of the path she is tracing. 2Copy (a drawing, map, or design) by drawing over its lines on a superimposed piece of transparent paper. 映描，描摹 Example sentencesExamples We made a mosaic of the photographs covering each survey zone, and then we traced a new base map off the composite image. The implication of Pennell's comment is that Vermeer might have copied or traced the outlines of an image and in this way obtained relative sizes for the objects depicted. If you are not confident in your drawing skills, you may want to use a piece of tracing paper and trace the image you would to place on the rubber stamp. This silhouette or ‘side view’ became a pattern from which a second, identical piece could be traced and cut out. With a pencil, draw or trace your preferred image onto the paper. So I used the box to trace out a heart-shaped piece of paper and wrote a Valentine's note to my teacher. In this instance, I encourage them to trace the drawing or part of it on tracing paper. Making clones of clones is like tracing a master painting through thin paper and expecting the copy to appear just as perfect as the original. Neither the original nor the projected copy have been traced. I had prepared a template for two portraits, which they traced onto their paper. This will help you decide what piece to trace first. Using graphite paper, they traced their portrait onto the map pieces. On butcher paper, trace the outline of the chair seat, then add 1 inch around all sides. Last, the sketch was held firmly against the watercolor paper, while the outline of the shoe design was gently traced over with pencil. Try tracing each plaited mat design, making sure you don't change direction at any intersection. The students can either start this with a new drawing, trace the one they already made or even photocopy the first one to save time. They first drew their portrait on paper before tracing the sketch on to the fabric. When the colored pieces had all been traced, students used high-gloss polyurethane to paint both sides of the construction paper. Then, using a light table, students traced their enlarged drawings onto good student quality watercolor paper. Between the cups, the center band or center front piece can be traced while still attached to the other half of the bra. Synonyms copy, reproduce, go over, draw over, draw the lines of 2.1 Draw (a pattern or line), especially with one's finger or toe. （尤指用手指、脚趾）画（图，线） Example sentencesExamples Her hand moved over the sand slowly, tracing out strange patterns he couldn't distinguish. His finger traced a light circle around the wound. His hand gripped the hilt of his sword, the blade drawn but down so the point traced a line in the snow. She dipped her hand in the fountain, her fingers tracing lazy eights. Dust had collected on the tube's surface, turning Nick's finger a dark gray once he ran his finger across it, tracing a clear streak across the cloudy tube. Now, with your finger, trace a few quick lines in the heap, imposing some sort of visual rhythm. I knew where his hands were on my back, I could feel the patterns he was tracing with his fingers, where my hands were behind his neck, the fireworks exploding in my head. I started tracing a weird, abstract pattern of something or other on her window that had fogged in the cold afternoon. My finger traced a smiley face onto one of the condensation-covered windows of Matt's car as it pulled onto the grass that was my grandmother's driveway. He realised for the first time that his left arm had wrapped around her other side to hold her in an embrace, and that his fingers were tracing small circles over her stomach. Sighing, Jeff looked downward, his fingers tracing out a pattern on the counter. She lay in his arms, her head resting on his chest, her fingers tracing random, abstract patterns on his chest. He reached up with one dirty finger, tracing a tiny smile in the fog he had made. 2.2 Give an outline of. 勾画出轮廓，描绘 the article traces out some of the connections between education, qualifications, and the labor market 这篇文章勾勒出教育，资格及劳动力市场之间的某些联系。 Example sentencesExamples Figure 6.3 is a useful alternative way of looking at this issue since it traces out combinations of prices for the two markets which yield the same levels of consumer surplus or profits. nountrāstreɪs 1A mark, object, or other indication of the existence or passing of something. 痕迹，踪迹 remove all traces of the old adhesive 除去所有旧的粘合剂留下的痕迹。 the aircraft disappeared without trace 飞机消失得无影无踪。 Example sentencesExamples Kelly takes pains to disguise them, to remove all traces of expression. A gambler would probably ask how many zeroes need to be added to the donation for all traces of morality to disappear. But after she underwent chemotherapy, minor surgery and radiotherapy, all traces of the tumour disappeared. It has written to all the parties to warn them to remove all traces of the posters within the allotted timeframe and said some local authorities are offering a recycling service to encourage the process. Following the inspector's decision, Mr Crawford has six months to remove all traces of the extension. The building of the Bow flyover removed all traces of the old bridge, and the River Lea is now barely visible beside the dual carriageway beneath. Next my face was cleansed to remove impurities and all traces of make-up. In this case, it removes any traces of sympathy I might have had. Today, they had disappeared without a trace, not even in evidence on a remainder table. This is further refined by carbon filtration to remove any traces of molasses before crystallization. Gold's faster-paced songs had a vacant way of flowing through you and leaving no residual traces of their passing. This step stimulates the circulation, reduces oiliness, helps to refine the pores and skin texture, and removes the last traces of grease, dead cells and grime, and firms the skin. Is it they way they take previously nice pubs and turn them into standardised bright yellow tackfests, thus removing all traces of character and individuality? While the vast majority of films disappeared without a trace, a few ones survived the passage of time and retained their appeal. Remove all traces of a normal childhood, market him well and watch as he rises to superstardom. It was just this cleansing oil that's supposed to remove all traces of makeup so you are ready to go sleep with no risk of clogged pores. The pistol was cleaned with liberal applications of Crud Cutter until there were no traces of old lube remaining. Remove remaining traces of wax with a cloth moistened with mineral spirits (paint thinner) or cream furniture wax. Surely our leaders would be better engaged to remove all traces of film music from our holy places rather than chasing female marathon runners. But I think that even if I get rid of all visible traces, that mark of vulnerability that he's left on my home will remain for a long time to come. Synonyms vestige, sign, mark, indication, suggestion, evidence, clue trail, track, spoor, marks, tracks, prints, imprints, footprints, footmarks, footsteps 1.1 A line or pattern displayed by an instrument using a moving pen or a luminous spot on a screen to show the existence or nature of something that is being investigated. 描记线，描记图 Example sentencesExamples A direct writing electrocardiograph was attached, and I was offered the trace. Computer analysis of the trace is used to retrieve the spectral phase of the input pulse (a). Objective responses are recorded on a polygraph trace. In this instance, 10 traces were recorded simultaneously, in real time (only one trace is shown in the figure). The traces were recorded at different voltages. The consensus model presented here is derived from the results of analyzing only six traces recorded in response to a single perturbation. A total of 16.4 million DNA sequencing traces were processed using the pipeline depicted in Figure 1. Only recently have correlators become available that can also record the intensity traces. Baxter must now wait to see if the IOC will agree to a second test to establish the nature of the trace detected. It is a trace of the electrical activity of the human brain. The duration of the stimulus presentation was synchronized with the refresh traces of the monitor. During recognition, the probe accesses the traces of all studied items in parallel. Sequencing traces were processed using Sequencher (Gene Codes, Ann Arbor, MI). It records the trace of that one-minute or twenty seconds - which can seem very long - of standing face to face with another person. Fig.2 A shows typical current traces recorded for synaptophysin channels. When the Bug detects Mr. Grout, we expect to see spikes in the neural traces displayed on the lower half of the monitor. 1.2 A physical change in the brain presumed to be caused by a process of learning or memory. （大脑上的学习或记忆）痕迹，印迹 Example sentencesExamples Mean familiarity across all traces in memory indexes the likelihood that a match response is elicited. The dim light makes the figures in the background literally hard to see, as if they were fleeting traces of memory, just beyond the viewer's grasp. In addition to encoding stimulus intensity information into the episodic trace, it is likely that response information is encoded. Greg Edmonson's fractured landscapes show traces of memory that linger as layers within the spaces of our mind. This allows us to assess whether response information is included in the episodic trace, as has been suggested by Neill. Remote traces of their memory still seemed to exist somewhere in me. You dilute the active ingredient down till there's just a trace or memory, an essence - so it's the vibration of the flower that's working. It's now possible to map music's traces in the brain, study its impact on the immune system, and listen to the songs of black holes and living cells. They came to him evanescently, and left without leaving a trace in his memory - so brief and so quick. But of course, traces of his memory still lingered in the back of her head, just waiting to be re-awakened. Maintaining a large number of memory traces over long time periods has biological costs, which might be greater than the costs of allowing some traces to deteriorate. Commitment to memory or a given past is weak if its physical trace is planned to be removable and possibly replaced. According to models of episodic memory, contextual similarity is a driving force in influencing the probability of the retrieval of an episodic trace. Yet they remain as traces in the memory of country. Reconstruction of the mental trace in a complex process, after the fact, is a major challenge as few realize. Vague traces of memory returned to her with the rush-slap of waves against the sides of the boat and the pregnant silence of the company. The palace at Versailles was for Louis a haunted house in which spectres of his great-grandfather mingled with the memories and traces of his lost loved ones. 2A very small quantity, especially one too small to be accurately measured. 微量，少许（尤指太少无法精确量算） his body contained traces of amphetamines 他身体里有微量安非他明。 as modifier trace quantities of PCBs 微量多氯化联苯。 Example sentencesExamples In response to revisionist charges, they tested the gas chamber walls for residual traces of cyanide gas but found none. Cadmium is found in all soils in at least trace quantities. An autopsy showed high levels of carbon monoxide in her blood as well as traces of amphetamines. The datolite from this locality also showed traces of platinum but in insufficient quantities to be the coloring agent. The hope is that someday people could wear a badge that would turn a color or make a noise when an specific nerve agent is present in trace quantities. Both the very high residual sugar and the trace materials secreted by the botrytis into the juice inhibit fermentation. The machines get their name because they blast a ‘puff’ of air over a passenger, and the sample is then analyzed for traces of explosives residue. But finally the state enforced better emissions standards, and the talc disappeared, except for traces here and there. A urine sample contained traces of the drug and Norton faces a six months ban at a disciplinary hearing. It'll go away in time, about the same time as you stop leaving traces of explosives residue about the place. When it comes to beating a drug test, there are basically three approaches: supply a fake sample, mask drug traces or hold them all in. But current studies show that, ingested in the trace amount found in Hinkley's water, or in food, it's harmless. Ammonia, for example, is present in trace quantities, yet it is considered to be essential in maintaining soils at a pH of around eight, that is, optimal for sustaining life. Each pit can hold a trace quantity of a chemical that reacts to a certain protein found in the blood. The dogs are trained to find blood-stained weapons, clothing and property, miniscule traces of blood and body fluid. Fairweather suggests this may point towards incoming prisoners changing the type of drugs they use from cannabis, which leaves traces in the body for a long time, to heroin, which is quickly flushed from the body. A trace amount of mercury is more than the body needs. If homeopathic theory was correct, the trace amounts of caffeine in decaff ought to have me bouncing off the ceiling. In the early days of DNA testing, samples had to be over a certain size for scientists to work with them, but now the smallest trace of body fluid or even skin flakes can provide a profile. As science becomes better at measuring small amounts of trace chemicals that are potential carcinogens, the zero risk approach is increasingly restrictive. 2.1 A slight indication or barely discernible hint of something. 丝毫；勉强可以发现的痕迹 just a trace of a smile 仅是一丝微笑。 Example sentencesExamples But I could see faint traces of a smile starting to appear. A trace of sadness was barely audible in Cattia's flat voice, perhaps such a small sliver of one that only Tania really could pick it up. I could hear the traces of a wistful smile in his voice. There is a faint trace of a smile, but he does not flinch: whatever the honorary boyo's faults, he is unlikely to be bought with a knighthood. Josh's breathing grew shallow and a single tear dropped from his eye, but I could see the traces of the smile I loved so much beginning on his face. Any trace of a smile that I had on my face at that time fell. He may be a little world-weary, but behind the half-beard and the straggly locks there's the faintest trace of a smile. She rolled her eyes, but a trace of a smile graced her lips. Zach shrugged, the faintest traces of a smile appearing on his lips. Michan thought he saw the traces of a smile in the Commander's eyes. Her raised chin and an ‘upside-down smile’ reveal traces of disgust, anger, and sadness. Butler is softly spoken with a trace of an Edinburgh burr still discernible in her gentle Canadian accent. Gregory smiled, the traces of sadness slowly vanishing. The trace of a smile flickered across head coach Wu Jingui's face. ‘Thanks,’ she said, looking flustered, but I noted that her lips held the traces of a smile. So he buckled right in with the trace of a grin on his face. The boy turned and walked back into the woods, then paused and turned back towards Kevin, all former traces of a smile replaced by a grim anger. Alex smiled, hiding traces of bitterness from her face. ‘You're always damned by the exception,’ Hill says with the slightest trace of a smile. It is a tribute to him that there is barely a trace of tedium in a performance lasting more than four hours. Synonyms bit, spot, speck, touch, hint, suggestion, suspicion, nuance, intimation 3A procedure to investigate the source of something, such as the place from which a telephone call was made, or the origin of an error in a computer program. （确定来电话者或计算机程序里确定故障源的）跟踪 Example sentencesExamples Witnesses took the number of the car and police conducted a trace on the vehicle. In the beginning of the film, Trinity is on the phone and we see the computer doing a telephone trace. 4A line which represents the projection of a curve or surface on a plane or the intersection of a curve or surface with a plane. 交线，迹线，轨迹 Example sentencesExamples The sheets are bilobed about a median furrow, visible in both vertical and horizontal sections, and form straight to gently curved, cross-cutting traces. The axis of the trace is curved slightly to the left. The thick black curve of Fig.2 illustrates representative traces of tension versus time. 5North American West Indian A beaten path or small road; a track. 〈西印度，美〉踏出来的小路，小径；小道 Example sentencesExamples Path was synonymous with trace, another invaluable gift that pioneers used to penetrate the otherwise impassable. S'sahr barked an order and there were groans, but the troopers spread out keeping eyes open for any traces or tracks. Here, however, it came to be another old and enduring track through otherwise treacherous and disorienting terrain, a variation of path and trace. 6Mathematics The sum of the elements in the principle diagonal of a square matrix. 〔数〕迹 Example sentencesExamples This paper is more than an extension, however, for in it he used matrices, in particular the trace of a matrix, to greatly simplify the formulas he had presented in his 1926 paper. There is a clue to the way neural circuits control the disruptive forces of chaos in the trace in Figure 3. The sum of the eigenvalues is the trace of this matrix and it is sometimes called ‘total variance.’ Origin Middle English (first recorded as a noun in the sense ‘path that someone or something takes’): from Old French trace (noun), tracier (verb), based on Latin tractus (see tract). trace² nountrāstreɪs Each of the two side straps, chains, or ropes by which a horse is attached to a vehicle that it is pulling. 挽绳，缰绳 Example sentencesExamples Ales broke off in mid-explanation to dive into the crowd, reappearing clasping a handkerchief waving teenage girl, and yoking her into the cart's rope traces. The horses pulling the carriage suddenly took fright for no apparent reason, snapped the traces and bolted off, startling both the hosts and their guest of honour. Origin Middle English (denoting a pair of traces): from Old French trais, plural of trait (see trait). verb.1 noun.1
随便看	rock someone back on their heels rock sparrow rock speedwell rock spider Rock Springs rock-spun rock squirrel rock-staff rockstaff rock star rocksteady rock-steady rock steady rockster rockstone rock stonecrop rock stream rock-strewn rock sturgeon rock-sucker rock sugar rock swallow rock terrace rock the boat rock the boat

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