Definition of tooth in English:

tooth

nounPlural teeth tuːθtuθ

1Each of a set of hard, bony enamel-coated structures in the jaws of most vertebrates, used for biting and chewing.
（绝大多数脊椎动物的）牙，齿
he clenched his teeth
as modifier tooth decay
Example sentencesExamples
- Dental caries or sugar-bacterial tooth decay is largely preventable.
- Some malocclusions cannot be treated successfully without removing permanent teeth, though tooth removal is contraindicated in other situations.
- You may lose both the wisdom tooth and the tooth next to it because of extensive decay.
- It is easy for tiny amounts of food to get trapped in the tiny dents or fissures, and if you do not brush them thoroughly, bacteria can build up and start to decay the tooth.
- The pain is aggravated by eating, gum chewing, teeth clenching, or yawning.
- Maxillary or posterior dentary teeth more recurved, denticles present on the anterior carinae.
- Close association of shark teeth with a vertebrate skeleton is yet another type of fossil record that may indicate shark feeding.
- Wisdom teeth are the last teeth at each end of the upper and lower gums, at the very back of the mouth.
- The core structure of the tooth is composed of dentine.
- These can expose your baby's teeth to harmful acids, which can attack the newly formed teeth and cause decay.
- The sugar in milk and juices will eat at your child's teeth and may cause decay.
- In nonmammalian vertebrates, tooth replacement is intimately related to growth.
- Dental caries occur when bacteria destroy the enamel surface of the tooth and cause decay.
- There also will be worse staining of the teeth and some risk of tooth loss from caries because of the sugar in chewing tobacco.
- If the teeth are not cleaned properly they may be vulnerable to tooth decay causing cavities, or to gum disease.
- He sucked in his breath through his teeth, biting down hard to try and suppress the throbbing left behind by a revolver's bullet's passage.
- Fluoride helps make teeth strong and prevents tooth decay.
- Red, swollen areas in a child's mouth or dark spots on the teeth are signs of tooth decay.
- The teeth are natural with occlusal amalgam fillings in teeth 30 and 31.
- Titan triggerfish are armed with powerful jaws and teeth suitable for chewing bony corals divers should steer clear of them!
Synonyms
fang, denticulation
tusk
Zoology denticle
(teeth), dentition
informal gnasher
rare tush
1. 1.1 Each of a number of hard, pointed structures in or around the mouth of some invertebrates, functioning in the physical breakdown of food.
  （无脊椎动物的）牙，齿
2. 1.2teeth Genuine power or effectiveness of an organization or in a law or agreement.
  〈喻〉（机构的）真正力量；（法律、协定的）真正作用，有效性
  the Charter would be fine if it had teeth and could be enforced
  如果《宪章》能有效实施的话，那就好了。
  Example sentencesExamples
  This is not like treaty claims, because the Maori Land Court will have teeth and power in a way that the Waitangi Tribunal does not.
  Many of the rules seem to lack teeth when it comes to punishing erring hospitals that continue to dump their waste with impunity.
  If we want the UN to rule, we have to give the UN teeth: as you say, military power.
  What teeth do police authorities have when they cannot challenge on operational matters?
  Corporations are attracted to the WTO to get business-friendly trade rules because it has teeth.
  The act gave teeth to a series of treaties designed to protect migratory birds, including the swan family, from extinction.
  And the regulatory body that existed before he came to power, has no teeth and can't stop him.
  It goes a little way to doing that, by giving the regulators some power and some teeth.
  I think Bingley needs a central organisation, with some teeth.
  In fairness the industry and the Scottish executive now recognise there are problems, but tough regulatory controls with real teeth and sanctions are needed.
3. 1.3teeth Used in curses or exclamations.
  该死（骂人话，感叹词）
  Hell's teeth!
  该死！
2A projecting part on a tool or other instrument, especially one of a series that function or engage together, such as a cog on a gearwheel or a point on a saw.
（工具、器具的）齿状物
Example sentencesExamples
- Desargues proposed cycloidal teeth for gear wheels in the 1630's.
- A toothed rack rail is laid in the middle of the track on the slopes and the pinions attached to the engine engage with the teeth of the rack bars and enable the engine to pull itself and its load up.
Synonyms
prong, point, tine, cog, ratchet, sprocket
1. 2.1 A projecting part on an animal or plant, especially one of a jagged or dentate row on the margin of a leaf or shell.
  （动、植物的）齿状物（尤指叶子或贝壳边缘）
  Example sentencesExamples
  There are close-ups of leaf teeth and scales, for examples, and composite photos of Quercus and Carya fruits.
  The margin of the aloe leaf is usually lifted with teeth having a sharp terminal spine on the end of each leaf.
  Only a few shells measured had teeth or conspicuous apertural thickening, and these features were not measured in this study.
  The angiosperms range from small leaves with chloranthoid teeth to larger leaves of the Ficophyllum type.
  Or a garden that had plants with teeth, rather than pretty petals.
  The fleshy stems are angled with soft teeth, and no leaves.
  The cone shell has modified teeth, like small poison-loaded harpoons, which it shoots out if disturbed.
3in singular An appetite or liking for a particular thing.
口味；爱好
what a tooth for fruit a monkey has!
猴子是多么的爱吃水果啊！
4mass noun Roughness given to a surface to allow colour or glue to adhere.
粗糙面（颜料、胶水能黏附于上）
the paper used in copying machines is good as it has tooth and takes ink well
Example sentencesExamples
- Slick surfaces often needed to be sanded to give them tooth so paint and other materials will adhere better.

Phrases

fight tooth and nail

Fight very fiercely.
凶猛地打斗
Example sentencesExamples
- When the oil industry appeared they fought it tooth and nail.
- He did not know me from Adam, but he fought tooth and nail as if I was his property.
- Spain and Poland had fought tooth and nail over their voting status in the European Council as agreed in Nice in 2000, which gave them each almost the same number of votes as much more populous countries like Britain, France and Germany.
- He has fought tooth and nail to ensure the Parliament is more democratic, has more powers and is more relevant to people out there’.
- The airlines fought tooth and nail against passenger-bag matching because it would slow down the check-in process.
- ‘Every piece offered… they fought tooth and nail to keep it in,’ said one official involved in putting together the speech.
- The most hoggish CEOs of the year, though, are America's media moguls, who fought tooth and nail against a pay raise that was being sought by the people who write the scripts for their movies and TV shows.
- The people who fought tooth and nail to keep VCRs off the market will have a veto over all new digital television devices, including digital television devices that interface with personal computers.
- The CIA battles tooth and nail over material from fifty years ago.
- She said: ‘We have fought tooth and nail for a new pool.’
- And it must be remembered that each step from rhetoric to reality was fought tooth and nail by those who preferred the status quo, and often fought with eerily similar rhetoric.
- The Algerian and Egyptian governments have fought tooth and nail for years to prevent the installation of Islamic law as the only form of law in their countries.
- The Today programme is an agenda setting news programme, that I've fought tooth and nail and to be able to listen to in the ‘Ladies Gym’ - as they insist on calling it - in my gym.
- But the Ulster Champions were in no mood for waving white flags instead they got bodies behind the ball, pushed themselves that extra inch and fought tooth and nail not to concede.
- Both these teams were unbeaten going into this Division Two top of the table clash and it was easy to see why as both fought tooth and nail to maintain their respective 100 per cent records.
- Everyone fought tooth and nail to keep the families here and we thought they had a chance.
- ‘We received our five star tidy town rating two years ago and fought tooth and nail to maintain it,’ he said.
- They kept plugging away, fought tooth and nail for every ball, got stuck in when it mattered, kept the heads up, the only problem was their level of finesse simply eluded them on the day.
- Since the industry has fought tooth and nail against mandatory COOL legislation, there is no way for them to know which chicken came from which kill plant.
- Pinned almost on their own line, Naas were unable to regain possession for almost nine agonising minutes of additional time as an heroic defence fought tooth and nail to keep the opposition out

get (or sink) one's teeth into

Work energetically and productively on (a task)
积极而富成效地工作；专注于
the course gives students something to get their teeth into
这门课程能给学生一些值得深究的东西。
Example sentencesExamples
- My fingers drum on the desk as I pour over CNN and Newsday looking for stories to sink my teeth into.
- Here are four ready-made trips to sink your teeth into.
- For those who like a good laugh, there's a lot to sink your teeth into.
- And literary fiction has to have something that the present or prospective PhD students can get their teeth into.
- But set it during the October Crisis and that's something people can sink their teeth into.
- If you love the minimalist adventurism of Kompakt but need just a little more sensitive pop structure to sink your teeth into, then this comp's for you.
- Old fans won't be disappointed but more importantly, new fans will find something worthwhile to sink their teeth into.
- He has only had supporting roles to date, but for this production was chief baddie, the Sheriff of Nottingham, and it was one he really got his teeth into.
- What does enter my mind is when I see a particularly difficult challenge the country's facing and I see something that I disagree with, I think, Gosh, I wish I could sink my teeth into that.
- This story has been a little dicier for reporters to sink their teeth into because frankly you don't know quite what you're getting into.
- Occasionally along comes an example of populism run amok the critics can sink their teeth into.
- It's meaty material and I think any actor loves to do stuff you can sink your teeth into.
- But do take a look, there is certainly something for you to sink your teeth into.
- So if you desire a yummy book to sink your teeth into but can't commit to a Tolstoy, here is a list of five children's novels I have recently read and greatly enjoyed.
- This is the kind of contest I can really sink my teeth into.
- Serves me right for picking an easy read and not getting my teeth into something substantial.
- Now there's a sociological exercise I could sink my teeth into.
- And it really is playing against type, which my guess is, for you, really a role you could sink your teeth into.
- To widen the choice for the guests and ensure that there are more than just juicy fish chunks for guests to sink their teeth into, buffet lunch and dinner are also being served during the festival days.
- With over 30 clubs and societies to choose from, there is plenty on offer in Sligo IT for students to get their teeth into.

in the teeth of

1Directly against (the wind)
逆（风）
in the teeth of the gale we set off for the farm
Example sentencesExamples
- My brothers and sister and I would run out of the waves, blue with cold, get dressed in the teeth of whatever wind was blowing that day and retreat somewhere ‘out of the wind’ for a picnic lunch.
- Pam's life was full and happy; she took pleasure in natural history and the creation of a garden in the teeth of regular exposure to south westerly winds.
- We were fishing right in the teeth of a big wind on Chateau Lake.
- It's cold outside, and I won't be climbing those valleys today, in the teeth of that wind which always seems to be funnelling down from the colder heights.
- Some loon, an observer would say, mumbling to himself, clothing torn, hair matted with blood, the cut over his right eye probably still bleeding, staggering towards another impossible hill in the teeth of an impossible wind.
- Yesterday was a very long day in the teeth of a cold wind and the occasional shower.
1. 1.1In spite of (opposition or difficulty)
  顶着，不顾（反对，困难）
  the firm has expanded its building contracting division in the teeth of recession
  Example sentencesExamples
  Plans to create a school at Wellesley Park in the teeth of fierce opposition led to huge protests.
  Those committed to technological progress, therefore, are attempting to make their societies more just, more efficient and more productive in the teeth of religious opposition.
  … The Prime Minister has been right, and brave, to introduce market pressures into higher education by pushing through university top-up fees in the teeth of opposition from his egalitarian Chancellor.
  In virtually all cases this was pushed through from below, in the teeth of determined opposition from the national leaderships, particularly UNISON and the FBU.
  Bradford Council awarded Brighton-based UZ a three-year contract to run the annual festival in the teeth of opposition from local organisers who founded the event and ran it on a not-for-profit basis for many years.
  The Kirk is likely to approve limited embryo research in the teeth of determined opposition from traditionalists at this year's General Assembly.
  And secondly, I cannot imagine that it can be anything except deeply detrimental to do this in the teeth of Federation opposition, as opposed to through as much consultation and examination of the issues as possible.
  This has happened in the teeth of some very vocal opposition, mine included.
  The approval, although recommended by the planning officers' report, came in the teeth of opposition from district councillors, parish councillors, residents and community groups.
  The reform of local and central government was carried through in the teeth of opposition from the Milanese patricians, who lost their commanding position in the state's administration.
  But it is hard to imagine him miscalculating that it could be done in the teeth of active opposition from the other political parties, the electorate, and a somewhat sullen defence force.
  We brought in the National Curriculum, testing, independent inspections and greater choice, all in the teeth of outright opposition from Labour.
  Last year, the producers had agitated against this and had it removed in the teeth of opposition from exhibitors.
  Tomorrow our minimum wage, the one we introduced in the teeth of Tory opposition is going up again - to £4.50.
  Over 300,000 miners went out on strike to defend their living standards in the teeth of opposition from their union leaders.
  The project began last Friday in the teeth of furious Polish opposition; the Poles regard it as a snub and stand to lose out financially because they will not be able to levy tariffs on the pipeline.
  For the first time in two generations there is the chance for a party that embodies those hopes to win parliamentary seats in England and Wales in the teeth of opposition by Labour Party leaders.
  The sad outcome is that the operators could afford to fly in the teeth of all oppositions and put the system into use as scheduled.
  One of the things about the Scots coming to Ulster in 1609 / 1610, was that they received grants of Plantation lands in the teeth of opposition of many English servitors in Ireland.
  Those who marched, therefore, did so out of a profound sense of conviction that this was an unjust war and a crime against humanity and in the teeth of almost universal opposition from the political establishment.

Derivatives

toothed

adjective tuːθt

No doubt there are many that would disagree with that, but I like to think I emerged from the zip debacle, wiser and more philosophical in matters pertaining to fasteners and toothed catches on clothes.
Example sentencesExamples
- I can still see that curly dougla head of hair and white toothed smile of my business teacher as he spoke about marketing, selling and advertising.
- A toothed rack rail is laid in the middle of the track on the slopes and the pinions attached to the engine engage with the teeth of the rack bars and enable the engine to pull itself and its load up.
- The leaves are oval with pointed tips, toothed at the edges and rough on the upper surface.
- Some horror films provide us with a link back to our primal and savage past, when homo sapiens were at the mercy of a confusing and barely understood world, chock full of sharp toothed predators on the look out for some bi-pedal protein.
- Our ancestors, having weighed up the options, risked becoming dinner by sharing caves with sabre toothed beasts in order to gain shelter from the elements and have somewhere they could hang their coats.
- We acquired rage to help us kill sabre - toothed tigers; when the fight was over our brains would send the all - clear message to our bodies.
- It bears small, rather insignificant flowers with a collar of white-veined deeply toothed bracts above impressive prickly glaucous greyish-green leaves.
- A crime of such selfishness, vindictiveness and plain no-goodedness that I hesitate to lay it before you in all its red toothed, black cloaked and villainous evil.
- They get a chance to cross-examine that with a fine toothed comb.
- But when the daughter of the Fitzpatrick family begins to take a personal interest in Kwame, he is drawn inexorably into the stained, toothed wheels of history.
- No, they insisted that she had to take off her shoes and get patted down and have a wand passed over her body and have her Hello Kitty suitcase opened and examined with a fine toothed comb.
- Gail said parents should check heads at least every couple of days using a fine toothed or ‘detector’ comb and then remove them using a ‘nit comb’, lotion or shampoo.
- This heart, called an ‘escapement,’ consists of a clever arrangement of swinging paddles set beside a toothed wheel shaped like a crown.
- They are an aromatic, light yellow-green, with serrated, toothed edges.
- These last are well worth waiting for; the flower spikes can be up to nine feet tall, bearing stately heads of rich purple, thistle-like flowers above the toothed, grey green foliage.
- I told him that in the summertime I've had fresh sugarcane drinks at Quang Deli in south Minneapolis, where they roll the cane through a kind of toothed press, extracting the juice.
- The sperm whale, a toothed mammal whose lower jaw resembles a vast surfboard with peaked crenellations at its edges, has been found at 3000 metres.
- The artist who carved this elegant example exaggerated the length of the fish's toothed rostrum and streamlined its body.
- It's a documentary type thing speculating how ancient man coped with - and generally killed off - whopping great spiky toothed animals back in the dawn of time.

tooth-like

adjective

Conodonts are an extinct group of marine organisms whose preserved skeletal parts consist of tiny phosphatic tooth-like elements.
Example sentencesExamples
- The alien was a Murak male, he was about a foot taller than Ligell, had dark brown skin, a single short horn reaching out the right side of his head, and several tooth-like ridges bordering the sides of his head.
- The innovation in question is the labral tooth, a tooth-like or spine-like protrusion pointing toward the substratum on the edge of the outer lip of the aperture.
- It has large tooth-like projections on the lower jaw, the adult eyes have horizontal pupils, non-webbed toes and longitudinal elevated skin folds.
- Note that bird chicks develop an egg tooth that is used to break the egg shell during hatching, so birds must have the genes needed to specify the development of a tooth-like appendage to the beak.
- It has five tooth-like plates that point inward and is moved by 60 muscles.
- The head opened up to reveal rows of tooth-like thorns.
- Classical embryology long ago demonstrated that grafting dental epithelium onto non-dental mesenchyme could produce tooth-like structures if the experiment were performed early enough in development.
- They are known to bite inquisitive humans using tooth-like projections on their lower jaw.
- Four miles to the north-east is the island of Boreray and its atmospheric outliers: the whitewashed tooth-like 564 ft Stac Lee and its more northern neighbour, Stac an Armin.
- A pair of short tooth-like horns poked from a bush of curly hair that topped the faun's clever-looking face.
- The outer part of the saber was lined with sharp tooth-like spikes which were left over from Dante's ‘Ryushinken’.
- They have small tooth-like scales covered with an enamel-like layer.
- Ordovician strata are characterized by numerous and diverse trilobites and conodonts (phosphatic fossils with a tooth-like appearance) found in sequences of shale, limestone, dolostone, and sandstone.

Origin

Old English tōth (plural tēth), of Germanic origin; related to Dutch tand and German Zahn, from an Indo-European root shared by Latin dent-, Greek odont-.

An Old English word from an ancient root shared by Latin dens, the source of dental (late 16th century), dentist (mid 18th century), trident (late 16th century) ‘three teeth’, and indent. To fight tooth and nail was in the 16th century to fight with tooth and nail. Although in a real fight this would mean ‘by biting and scratching’, the phrase is almost always used of non-physical struggles. To set someone's teeth on edge is to cause them intense irritation. The expression comes from the Bible, and expresses the unpleasant sensation felt when you have bitten into something that is bitter or sour: ‘Every man that hath eaten the sour grape, his teeth shall be set on edge’ (Jeremiah). See also hen

Rhymes

buck tooth, couth, Duluth, forsooth, Maynooth, ruth, sleuth, sooth, strewth, truth, youth

Definition of tooth in US English:

tooth

nountuθto͞oTH

1Each of a set of hard, bony enamel-coated structures in the jaws of most vertebrates, used for biting and chewing.
（绝大多数脊椎动物的）牙，齿
Example sentencesExamples
- You may lose both the wisdom tooth and the tooth next to it because of extensive decay.
- Maxillary or posterior dentary teeth more recurved, denticles present on the anterior carinae.
- Close association of shark teeth with a vertebrate skeleton is yet another type of fossil record that may indicate shark feeding.
- Red, swollen areas in a child's mouth or dark spots on the teeth are signs of tooth decay.
- There also will be worse staining of the teeth and some risk of tooth loss from caries because of the sugar in chewing tobacco.
- It is easy for tiny amounts of food to get trapped in the tiny dents or fissures, and if you do not brush them thoroughly, bacteria can build up and start to decay the tooth.
- The pain is aggravated by eating, gum chewing, teeth clenching, or yawning.
- In nonmammalian vertebrates, tooth replacement is intimately related to growth.
- Fluoride helps make teeth strong and prevents tooth decay.
- The teeth are natural with occlusal amalgam fillings in teeth 30 and 31.
- These can expose your baby's teeth to harmful acids, which can attack the newly formed teeth and cause decay.
- Dental caries occur when bacteria destroy the enamel surface of the tooth and cause decay.
- He sucked in his breath through his teeth, biting down hard to try and suppress the throbbing left behind by a revolver's bullet's passage.
- The sugar in milk and juices will eat at your child's teeth and may cause decay.
- Some malocclusions cannot be treated successfully without removing permanent teeth, though tooth removal is contraindicated in other situations.
- If the teeth are not cleaned properly they may be vulnerable to tooth decay causing cavities, or to gum disease.
- Titan triggerfish are armed with powerful jaws and teeth suitable for chewing bony corals divers should steer clear of them!
- Dental caries or sugar-bacterial tooth decay is largely preventable.
- The core structure of the tooth is composed of dentine.
- Wisdom teeth are the last teeth at each end of the upper and lower gums, at the very back of the mouth.
Synonyms
fang, denticulation
1. 1.1 A hard, pointed structure in invertebrate animals, typically functioning in the mechanical breakdown of food.
  （无脊椎动物的）牙，齿
2. 1.2teeth Genuine force or effectiveness of a body or in a law or agreement.
  〈喻〉（机构的）真正力量；（法律、协定的）真正作用，有效性
  the Charter would be fine if it had teeth and could be enforced
  如果《宪章》能有效实施的话，那就好了。
  Example sentencesExamples
  And the regulatory body that existed before he came to power, has no teeth and can't stop him.
  This is not like treaty claims, because the Maori Land Court will have teeth and power in a way that the Waitangi Tribunal does not.
  What teeth do police authorities have when they cannot challenge on operational matters?
  Many of the rules seem to lack teeth when it comes to punishing erring hospitals that continue to dump their waste with impunity.
  Corporations are attracted to the WTO to get business-friendly trade rules because it has teeth.
  The act gave teeth to a series of treaties designed to protect migratory birds, including the swan family, from extinction.
  I think Bingley needs a central organisation, with some teeth.
  In fairness the industry and the Scottish executive now recognise there are problems, but tough regulatory controls with real teeth and sanctions are needed.
  It goes a little way to doing that, by giving the regulators some power and some teeth.
  If we want the UN to rule, we have to give the UN teeth: as you say, military power.
2A projecting part on a tool or other instrument, especially one of a series that function or engage together, such as a cog on a gearwheel or a point on a saw or comb.
（工具、器具的）齿状物
Example sentencesExamples
- Desargues proposed cycloidal teeth for gear wheels in the 1630's.
- A toothed rack rail is laid in the middle of the track on the slopes and the pinions attached to the engine engage with the teeth of the rack bars and enable the engine to pull itself and its load up.
Synonyms
prong, point, tine, cog, ratchet, sprocket
1. 2.1 A projecting part on an animal or plant, especially one of a jagged or dentate row on the margin of a leaf or shell.
  （动、植物的）齿状物（尤指叶子或贝壳边缘）
  Example sentencesExamples
  There are close-ups of leaf teeth and scales, for examples, and composite photos of Quercus and Carya fruits.
  The fleshy stems are angled with soft teeth, and no leaves.
  The cone shell has modified teeth, like small poison-loaded harpoons, which it shoots out if disturbed.
  Only a few shells measured had teeth or conspicuous apertural thickening, and these features were not measured in this study.
  The angiosperms range from small leaves with chloranthoid teeth to larger leaves of the Ficophyllum type.
  Or a garden that had plants with teeth, rather than pretty petals.
  The margin of the aloe leaf is usually lifted with teeth having a sharp terminal spine on the end of each leaf.
3An appetite or liking for a particular thing.
口味；爱好
what a tooth for fruit a monkey has!
猴子是多么的爱吃水果啊！
4Roughness given to a surface to allow color or glue to adhere.
粗糙面（颜料、胶水能黏附于上）
Example sentencesExamples
- Slick surfaces often needed to be sanded to give them tooth so paint and other materials will adhere better.

Phrases

fight tooth and nail

Fight fiercely.
凶猛地打斗
Example sentencesExamples
- The CIA battles tooth and nail over material from fifty years ago.
- The people who fought tooth and nail to keep VCRs off the market will have a veto over all new digital television devices, including digital television devices that interface with personal computers.
- ‘We received our five star tidy town rating two years ago and fought tooth and nail to maintain it,’ he said.
- The most hoggish CEOs of the year, though, are America's media moguls, who fought tooth and nail against a pay raise that was being sought by the people who write the scripts for their movies and TV shows.
- Pinned almost on their own line, Naas were unable to regain possession for almost nine agonising minutes of additional time as an heroic defence fought tooth and nail to keep the opposition out
- The Algerian and Egyptian governments have fought tooth and nail for years to prevent the installation of Islamic law as the only form of law in their countries.
- He did not know me from Adam, but he fought tooth and nail as if I was his property.
- Both these teams were unbeaten going into this Division Two top of the table clash and it was easy to see why as both fought tooth and nail to maintain their respective 100 per cent records.
- When the oil industry appeared they fought it tooth and nail.
- Everyone fought tooth and nail to keep the families here and we thought they had a chance.
- ‘Every piece offered… they fought tooth and nail to keep it in,’ said one official involved in putting together the speech.
- He has fought tooth and nail to ensure the Parliament is more democratic, has more powers and is more relevant to people out there’.
- But the Ulster Champions were in no mood for waving white flags instead they got bodies behind the ball, pushed themselves that extra inch and fought tooth and nail not to concede.
- And it must be remembered that each step from rhetoric to reality was fought tooth and nail by those who preferred the status quo, and often fought with eerily similar rhetoric.
- Since the industry has fought tooth and nail against mandatory COOL legislation, there is no way for them to know which chicken came from which kill plant.
- Spain and Poland had fought tooth and nail over their voting status in the European Council as agreed in Nice in 2000, which gave them each almost the same number of votes as much more populous countries like Britain, France and Germany.
- They kept plugging away, fought tooth and nail for every ball, got stuck in when it mattered, kept the heads up, the only problem was their level of finesse simply eluded them on the day.
- The airlines fought tooth and nail against passenger-bag matching because it would slow down the check-in process.
- The Today programme is an agenda setting news programme, that I've fought tooth and nail and to be able to listen to in the ‘Ladies Gym’ - as they insist on calling it - in my gym.
- She said: ‘We have fought tooth and nail for a new pool.’

get (or sink) one's teeth into

Work energetically and productively on (a task)
积极而富成效地工作；专注于
the course gives students something to get their teeth into
这门课程能给学生一些值得深究的东西。
Example sentencesExamples
- For those who like a good laugh, there's a lot to sink your teeth into.
- It's meaty material and I think any actor loves to do stuff you can sink your teeth into.
- Occasionally along comes an example of populism run amok the critics can sink their teeth into.
- To widen the choice for the guests and ensure that there are more than just juicy fish chunks for guests to sink their teeth into, buffet lunch and dinner are also being served during the festival days.
- Old fans won't be disappointed but more importantly, new fans will find something worthwhile to sink their teeth into.
- He has only had supporting roles to date, but for this production was chief baddie, the Sheriff of Nottingham, and it was one he really got his teeth into.
- If you love the minimalist adventurism of Kompakt but need just a little more sensitive pop structure to sink your teeth into, then this comp's for you.
- Serves me right for picking an easy read and not getting my teeth into something substantial.
- And literary fiction has to have something that the present or prospective PhD students can get their teeth into.
- What does enter my mind is when I see a particularly difficult challenge the country's facing and I see something that I disagree with, I think, Gosh, I wish I could sink my teeth into that.
- With over 30 clubs and societies to choose from, there is plenty on offer in Sligo IT for students to get their teeth into.
- But set it during the October Crisis and that's something people can sink their teeth into.
- My fingers drum on the desk as I pour over CNN and Newsday looking for stories to sink my teeth into.
- And it really is playing against type, which my guess is, for you, really a role you could sink your teeth into.
- This story has been a little dicier for reporters to sink their teeth into because frankly you don't know quite what you're getting into.
- This is the kind of contest I can really sink my teeth into.
- Now there's a sociological exercise I could sink my teeth into.
- So if you desire a yummy book to sink your teeth into but can't commit to a Tolstoy, here is a list of five children's novels I have recently read and greatly enjoyed.
- But do take a look, there is certainly something for you to sink your teeth into.
- Here are four ready-made trips to sink your teeth into.

in the teeth of

1Directly against (the wind).
逆（风）
Example sentencesExamples
- Pam's life was full and happy; she took pleasure in natural history and the creation of a garden in the teeth of regular exposure to south westerly winds.
- We were fishing right in the teeth of a big wind on Chateau Lake.
- Yesterday was a very long day in the teeth of a cold wind and the occasional shower.
- Some loon, an observer would say, mumbling to himself, clothing torn, hair matted with blood, the cut over his right eye probably still bleeding, staggering towards another impossible hill in the teeth of an impossible wind.
- My brothers and sister and I would run out of the waves, blue with cold, get dressed in the teeth of whatever wind was blowing that day and retreat somewhere ‘out of the wind’ for a picnic lunch.
- It's cold outside, and I won't be climbing those valleys today, in the teeth of that wind which always seems to be funnelling down from the colder heights.
1. 1.1In spite of or contrary to (opposition or difficulty)
  顶着，不顾（反对，困难）
  we defended it in the teeth of persecution
  尽管会遭受迫害，我们仍为其辩护。
  Example sentencesExamples
  But it is hard to imagine him miscalculating that it could be done in the teeth of active opposition from the other political parties, the electorate, and a somewhat sullen defence force.
  This has happened in the teeth of some very vocal opposition, mine included.
  … The Prime Minister has been right, and brave, to introduce market pressures into higher education by pushing through university top-up fees in the teeth of opposition from his egalitarian Chancellor.
  Plans to create a school at Wellesley Park in the teeth of fierce opposition led to huge protests.
  In virtually all cases this was pushed through from below, in the teeth of determined opposition from the national leaderships, particularly UNISON and the FBU.
  Tomorrow our minimum wage, the one we introduced in the teeth of Tory opposition is going up again - to £4.50.
  The project began last Friday in the teeth of furious Polish opposition; the Poles regard it as a snub and stand to lose out financially because they will not be able to levy tariffs on the pipeline.
  We brought in the National Curriculum, testing, independent inspections and greater choice, all in the teeth of outright opposition from Labour.
  Those committed to technological progress, therefore, are attempting to make their societies more just, more efficient and more productive in the teeth of religious opposition.
  Last year, the producers had agitated against this and had it removed in the teeth of opposition from exhibitors.
  The reform of local and central government was carried through in the teeth of opposition from the Milanese patricians, who lost their commanding position in the state's administration.
  Those who marched, therefore, did so out of a profound sense of conviction that this was an unjust war and a crime against humanity and in the teeth of almost universal opposition from the political establishment.
  Bradford Council awarded Brighton-based UZ a three-year contract to run the annual festival in the teeth of opposition from local organisers who founded the event and ran it on a not-for-profit basis for many years.
  Over 300,000 miners went out on strike to defend their living standards in the teeth of opposition from their union leaders.
  One of the things about the Scots coming to Ulster in 1609 / 1610, was that they received grants of Plantation lands in the teeth of opposition of many English servitors in Ireland.
  For the first time in two generations there is the chance for a party that embodies those hopes to win parliamentary seats in England and Wales in the teeth of opposition by Labour Party leaders.
  The Kirk is likely to approve limited embryo research in the teeth of determined opposition from traditionalists at this year's General Assembly.
  The sad outcome is that the operators could afford to fly in the teeth of all oppositions and put the system into use as scheduled.
  And secondly, I cannot imagine that it can be anything except deeply detrimental to do this in the teeth of Federation opposition, as opposed to through as much consultation and examination of the issues as possible.
  The approval, although recommended by the planning officers' report, came in the teeth of opposition from district councillors, parish councillors, residents and community groups.

Origin

Old English tōth (plural tēth), of Germanic origin; related to Dutch tand and German Zahn, from an Indo-European root shared by Latin dent-, Greek odont-.

词汇	tooth
释义	Definition of tooth in English: tooth nounPlural teeth tuːθtuθ 1Each of a set of hard, bony enamel-coated structures in the jaws of most vertebrates, used for biting and chewing. （绝大多数脊椎动物的）牙，齿 he clenched his teeth as modifier tooth decay Example sentencesExamples Dental caries or sugar-bacterial tooth decay is largely preventable. Some malocclusions cannot be treated successfully without removing permanent teeth, though tooth removal is contraindicated in other situations. You may lose both the wisdom tooth and the tooth next to it because of extensive decay. It is easy for tiny amounts of food to get trapped in the tiny dents or fissures, and if you do not brush them thoroughly, bacteria can build up and start to decay the tooth. The pain is aggravated by eating, gum chewing, teeth clenching, or yawning. Maxillary or posterior dentary teeth more recurved, denticles present on the anterior carinae. Close association of shark teeth with a vertebrate skeleton is yet another type of fossil record that may indicate shark feeding. Wisdom teeth are the last teeth at each end of the upper and lower gums, at the very back of the mouth. The core structure of the tooth is composed of dentine. These can expose your baby's teeth to harmful acids, which can attack the newly formed teeth and cause decay. The sugar in milk and juices will eat at your child's teeth and may cause decay. In nonmammalian vertebrates, tooth replacement is intimately related to growth. Dental caries occur when bacteria destroy the enamel surface of the tooth and cause decay. There also will be worse staining of the teeth and some risk of tooth loss from caries because of the sugar in chewing tobacco. If the teeth are not cleaned properly they may be vulnerable to tooth decay causing cavities, or to gum disease. He sucked in his breath through his teeth, biting down hard to try and suppress the throbbing left behind by a revolver's bullet's passage. Fluoride helps make teeth strong and prevents tooth decay. Red, swollen areas in a child's mouth or dark spots on the teeth are signs of tooth decay. The teeth are natural with occlusal amalgam fillings in teeth 30 and 31. Titan triggerfish are armed with powerful jaws and teeth suitable for chewing bony corals divers should steer clear of them! Synonyms fang, denticulation tusk Zoology denticle (teeth), dentition informal gnasher rare tush 1.1 Each of a number of hard, pointed structures in or around the mouth of some invertebrates, functioning in the physical breakdown of food. （无脊椎动物的）牙，齿 1.2teeth Genuine power or effectiveness of an organization or in a law or agreement. 〈喻〉（机构的）真正力量；（法律、协定的）真正作用，有效性 the Charter would be fine if it had teeth and could be enforced 如果《宪章》能有效实施的话，那就好了。 Example sentencesExamples This is not like treaty claims, because the Maori Land Court will have teeth and power in a way that the Waitangi Tribunal does not. Many of the rules seem to lack teeth when it comes to punishing erring hospitals that continue to dump their waste with impunity. If we want the UN to rule, we have to give the UN teeth: as you say, military power. What teeth do police authorities have when they cannot challenge on operational matters? Corporations are attracted to the WTO to get business-friendly trade rules because it has teeth. The act gave teeth to a series of treaties designed to protect migratory birds, including the swan family, from extinction. And the regulatory body that existed before he came to power, has no teeth and can't stop him. It goes a little way to doing that, by giving the regulators some power and some teeth. I think Bingley needs a central organisation, with some teeth. In fairness the industry and the Scottish executive now recognise there are problems, but tough regulatory controls with real teeth and sanctions are needed. 1.3teeth Used in curses or exclamations. 该死（骂人话，感叹词） Hell's teeth! 该死！ 2A projecting part on a tool or other instrument, especially one of a series that function or engage together, such as a cog on a gearwheel or a point on a saw. （工具、器具的）齿状物 Example sentencesExamples Desargues proposed cycloidal teeth for gear wheels in the 1630's. A toothed rack rail is laid in the middle of the track on the slopes and the pinions attached to the engine engage with the teeth of the rack bars and enable the engine to pull itself and its load up. Synonyms prong, point, tine, cog, ratchet, sprocket 2.1 A projecting part on an animal or plant, especially one of a jagged or dentate row on the margin of a leaf or shell. （动、植物的）齿状物（尤指叶子或贝壳边缘） Example sentencesExamples There are close-ups of leaf teeth and scales, for examples, and composite photos of Quercus and Carya fruits. The margin of the aloe leaf is usually lifted with teeth having a sharp terminal spine on the end of each leaf. Only a few shells measured had teeth or conspicuous apertural thickening, and these features were not measured in this study. The angiosperms range from small leaves with chloranthoid teeth to larger leaves of the Ficophyllum type. Or a garden that had plants with teeth, rather than pretty petals. The fleshy stems are angled with soft teeth, and no leaves. The cone shell has modified teeth, like small poison-loaded harpoons, which it shoots out if disturbed. 3in singular An appetite or liking for a particular thing. 口味；爱好 what a tooth for fruit a monkey has! 猴子是多么的爱吃水果啊！ 4mass noun Roughness given to a surface to allow colour or glue to adhere. 粗糙面（颜料、胶水能黏附于上） the paper used in copying machines is good as it has tooth and takes ink well Example sentencesExamples Slick surfaces often needed to be sanded to give them tooth so paint and other materials will adhere better. Phrases fight tooth and nail Fight very fiercely. 凶猛地打斗 Example sentencesExamples When the oil industry appeared they fought it tooth and nail. He did not know me from Adam, but he fought tooth and nail as if I was his property. Spain and Poland had fought tooth and nail over their voting status in the European Council as agreed in Nice in 2000, which gave them each almost the same number of votes as much more populous countries like Britain, France and Germany. He has fought tooth and nail to ensure the Parliament is more democratic, has more powers and is more relevant to people out there’. The airlines fought tooth and nail against passenger-bag matching because it would slow down the check-in process. ‘Every piece offered… they fought tooth and nail to keep it in,’ said one official involved in putting together the speech. The most hoggish CEOs of the year, though, are America's media moguls, who fought tooth and nail against a pay raise that was being sought by the people who write the scripts for their movies and TV shows. The people who fought tooth and nail to keep VCRs off the market will have a veto over all new digital television devices, including digital television devices that interface with personal computers. The CIA battles tooth and nail over material from fifty years ago. She said: ‘We have fought tooth and nail for a new pool.’ And it must be remembered that each step from rhetoric to reality was fought tooth and nail by those who preferred the status quo, and often fought with eerily similar rhetoric. The Algerian and Egyptian governments have fought tooth and nail for years to prevent the installation of Islamic law as the only form of law in their countries. The Today programme is an agenda setting news programme, that I've fought tooth and nail and to be able to listen to in the ‘Ladies Gym’ - as they insist on calling it - in my gym. But the Ulster Champions were in no mood for waving white flags instead they got bodies behind the ball, pushed themselves that extra inch and fought tooth and nail not to concede. Both these teams were unbeaten going into this Division Two top of the table clash and it was easy to see why as both fought tooth and nail to maintain their respective 100 per cent records. Everyone fought tooth and nail to keep the families here and we thought they had a chance. ‘We received our five star tidy town rating two years ago and fought tooth and nail to maintain it,’ he said. They kept plugging away, fought tooth and nail for every ball, got stuck in when it mattered, kept the heads up, the only problem was their level of finesse simply eluded them on the day. Since the industry has fought tooth and nail against mandatory COOL legislation, there is no way for them to know which chicken came from which kill plant. Pinned almost on their own line, Naas were unable to regain possession for almost nine agonising minutes of additional time as an heroic defence fought tooth and nail to keep the opposition out get (or sink) one's teeth into Work energetically and productively on (a task) 积极而富成效地工作；专注于 the course gives students something to get their teeth into 这门课程能给学生一些值得深究的东西。 Example sentencesExamples My fingers drum on the desk as I pour over CNN and Newsday looking for stories to sink my teeth into. Here are four ready-made trips to sink your teeth into. For those who like a good laugh, there's a lot to sink your teeth into. And literary fiction has to have something that the present or prospective PhD students can get their teeth into. But set it during the October Crisis and that's something people can sink their teeth into. If you love the minimalist adventurism of Kompakt but need just a little more sensitive pop structure to sink your teeth into, then this comp's for you. Old fans won't be disappointed but more importantly, new fans will find something worthwhile to sink their teeth into. He has only had supporting roles to date, but for this production was chief baddie, the Sheriff of Nottingham, and it was one he really got his teeth into. What does enter my mind is when I see a particularly difficult challenge the country's facing and I see something that I disagree with, I think, Gosh, I wish I could sink my teeth into that. This story has been a little dicier for reporters to sink their teeth into because frankly you don't know quite what you're getting into. Occasionally along comes an example of populism run amok the critics can sink their teeth into. It's meaty material and I think any actor loves to do stuff you can sink your teeth into. But do take a look, there is certainly something for you to sink your teeth into. So if you desire a yummy book to sink your teeth into but can't commit to a Tolstoy, here is a list of five children's novels I have recently read and greatly enjoyed. This is the kind of contest I can really sink my teeth into. Serves me right for picking an easy read and not getting my teeth into something substantial. Now there's a sociological exercise I could sink my teeth into. And it really is playing against type, which my guess is, for you, really a role you could sink your teeth into. To widen the choice for the guests and ensure that there are more than just juicy fish chunks for guests to sink their teeth into, buffet lunch and dinner are also being served during the festival days. With over 30 clubs and societies to choose from, there is plenty on offer in Sligo IT for students to get their teeth into. in the teeth of 1Directly against (the wind) 逆（风） in the teeth of the gale we set off for the farm Example sentencesExamples My brothers and sister and I would run out of the waves, blue with cold, get dressed in the teeth of whatever wind was blowing that day and retreat somewhere ‘out of the wind’ for a picnic lunch. Pam's life was full and happy; she took pleasure in natural history and the creation of a garden in the teeth of regular exposure to south westerly winds. We were fishing right in the teeth of a big wind on Chateau Lake. It's cold outside, and I won't be climbing those valleys today, in the teeth of that wind which always seems to be funnelling down from the colder heights. Some loon, an observer would say, mumbling to himself, clothing torn, hair matted with blood, the cut over his right eye probably still bleeding, staggering towards another impossible hill in the teeth of an impossible wind. Yesterday was a very long day in the teeth of a cold wind and the occasional shower. 1.1In spite of (opposition or difficulty) 顶着，不顾（反对，困难） the firm has expanded its building contracting division in the teeth of recession Example sentencesExamples Plans to create a school at Wellesley Park in the teeth of fierce opposition led to huge protests. Those committed to technological progress, therefore, are attempting to make their societies more just, more efficient and more productive in the teeth of religious opposition. … The Prime Minister has been right, and brave, to introduce market pressures into higher education by pushing through university top-up fees in the teeth of opposition from his egalitarian Chancellor. In virtually all cases this was pushed through from below, in the teeth of determined opposition from the national leaderships, particularly UNISON and the FBU. Bradford Council awarded Brighton-based UZ a three-year contract to run the annual festival in the teeth of opposition from local organisers who founded the event and ran it on a not-for-profit basis for many years. The Kirk is likely to approve limited embryo research in the teeth of determined opposition from traditionalists at this year's General Assembly. And secondly, I cannot imagine that it can be anything except deeply detrimental to do this in the teeth of Federation opposition, as opposed to through as much consultation and examination of the issues as possible. This has happened in the teeth of some very vocal opposition, mine included. The approval, although recommended by the planning officers' report, came in the teeth of opposition from district councillors, parish councillors, residents and community groups. The reform of local and central government was carried through in the teeth of opposition from the Milanese patricians, who lost their commanding position in the state's administration. But it is hard to imagine him miscalculating that it could be done in the teeth of active opposition from the other political parties, the electorate, and a somewhat sullen defence force. We brought in the National Curriculum, testing, independent inspections and greater choice, all in the teeth of outright opposition from Labour. Last year, the producers had agitated against this and had it removed in the teeth of opposition from exhibitors. Tomorrow our minimum wage, the one we introduced in the teeth of Tory opposition is going up again - to £4.50. Over 300,000 miners went out on strike to defend their living standards in the teeth of opposition from their union leaders. The project began last Friday in the teeth of furious Polish opposition; the Poles regard it as a snub and stand to lose out financially because they will not be able to levy tariffs on the pipeline. For the first time in two generations there is the chance for a party that embodies those hopes to win parliamentary seats in England and Wales in the teeth of opposition by Labour Party leaders. The sad outcome is that the operators could afford to fly in the teeth of all oppositions and put the system into use as scheduled. One of the things about the Scots coming to Ulster in 1609 / 1610, was that they received grants of Plantation lands in the teeth of opposition of many English servitors in Ireland. Those who marched, therefore, did so out of a profound sense of conviction that this was an unjust war and a crime against humanity and in the teeth of almost universal opposition from the political establishment. Derivatives toothed adjective tuːθt No doubt there are many that would disagree with that, but I like to think I emerged from the zip debacle, wiser and more philosophical in matters pertaining to fasteners and toothed catches on clothes. Example sentencesExamples I can still see that curly dougla head of hair and white toothed smile of my business teacher as he spoke about marketing, selling and advertising. A toothed rack rail is laid in the middle of the track on the slopes and the pinions attached to the engine engage with the teeth of the rack bars and enable the engine to pull itself and its load up. The leaves are oval with pointed tips, toothed at the edges and rough on the upper surface. Some horror films provide us with a link back to our primal and savage past, when homo sapiens were at the mercy of a confusing and barely understood world, chock full of sharp toothed predators on the look out for some bi-pedal protein. Our ancestors, having weighed up the options, risked becoming dinner by sharing caves with sabre toothed beasts in order to gain shelter from the elements and have somewhere they could hang their coats. We acquired rage to help us kill sabre - toothed tigers; when the fight was over our brains would send the all - clear message to our bodies. It bears small, rather insignificant flowers with a collar of white-veined deeply toothed bracts above impressive prickly glaucous greyish-green leaves. A crime of such selfishness, vindictiveness and plain no-goodedness that I hesitate to lay it before you in all its red toothed, black cloaked and villainous evil. They get a chance to cross-examine that with a fine toothed comb. But when the daughter of the Fitzpatrick family begins to take a personal interest in Kwame, he is drawn inexorably into the stained, toothed wheels of history. No, they insisted that she had to take off her shoes and get patted down and have a wand passed over her body and have her Hello Kitty suitcase opened and examined with a fine toothed comb. Gail said parents should check heads at least every couple of days using a fine toothed or ‘detector’ comb and then remove them using a ‘nit comb’, lotion or shampoo. This heart, called an ‘escapement,’ consists of a clever arrangement of swinging paddles set beside a toothed wheel shaped like a crown. They are an aromatic, light yellow-green, with serrated, toothed edges. These last are well worth waiting for; the flower spikes can be up to nine feet tall, bearing stately heads of rich purple, thistle-like flowers above the toothed, grey green foliage. I told him that in the summertime I've had fresh sugarcane drinks at Quang Deli in south Minneapolis, where they roll the cane through a kind of toothed press, extracting the juice. The sperm whale, a toothed mammal whose lower jaw resembles a vast surfboard with peaked crenellations at its edges, has been found at 3000 metres. The artist who carved this elegant example exaggerated the length of the fish's toothed rostrum and streamlined its body. It's a documentary type thing speculating how ancient man coped with - and generally killed off - whopping great spiky toothed animals back in the dawn of time. tooth-like adjective Conodonts are an extinct group of marine organisms whose preserved skeletal parts consist of tiny phosphatic tooth-like elements. Example sentencesExamples The alien was a Murak male, he was about a foot taller than Ligell, had dark brown skin, a single short horn reaching out the right side of his head, and several tooth-like ridges bordering the sides of his head. The innovation in question is the labral tooth, a tooth-like or spine-like protrusion pointing toward the substratum on the edge of the outer lip of the aperture. It has large tooth-like projections on the lower jaw, the adult eyes have horizontal pupils, non-webbed toes and longitudinal elevated skin folds. Note that bird chicks develop an egg tooth that is used to break the egg shell during hatching, so birds must have the genes needed to specify the development of a tooth-like appendage to the beak. It has five tooth-like plates that point inward and is moved by 60 muscles. The head opened up to reveal rows of tooth-like thorns. Classical embryology long ago demonstrated that grafting dental epithelium onto non-dental mesenchyme could produce tooth-like structures if the experiment were performed early enough in development. They are known to bite inquisitive humans using tooth-like projections on their lower jaw. Four miles to the north-east is the island of Boreray and its atmospheric outliers: the whitewashed tooth-like 564 ft Stac Lee and its more northern neighbour, Stac an Armin. A pair of short tooth-like horns poked from a bush of curly hair that topped the faun's clever-looking face. The outer part of the saber was lined with sharp tooth-like spikes which were left over from Dante's ‘Ryushinken’. They have small tooth-like scales covered with an enamel-like layer. Ordovician strata are characterized by numerous and diverse trilobites and conodonts (phosphatic fossils with a tooth-like appearance) found in sequences of shale, limestone, dolostone, and sandstone. Origin Old English tōth (plural tēth), of Germanic origin; related to Dutch tand and German Zahn, from an Indo-European root shared by Latin dent-, Greek odont-. An Old English word from an ancient root shared by Latin dens, the source of dental (late 16th century), dentist (mid 18th century), trident (late 16th century) ‘three teeth’, and indent. To fight tooth and nail was in the 16th century to fight with tooth and nail. Although in a real fight this would mean ‘by biting and scratching’, the phrase is almost always used of non-physical struggles. To set someone's teeth on edge is to cause them intense irritation. The expression comes from the Bible, and expresses the unpleasant sensation felt when you have bitten into something that is bitter or sour: ‘Every man that hath eaten the sour grape, his teeth shall be set on edge’ (Jeremiah). See also hen Rhymes buck tooth, couth, Duluth, forsooth, Maynooth, ruth, sleuth, sooth, strewth, truth, youth noun.1 phr. Definition of tooth in US English: tooth nountuθto͞oTH 1Each of a set of hard, bony enamel-coated structures in the jaws of most vertebrates, used for biting and chewing. （绝大多数脊椎动物的）牙，齿 Example sentencesExamples You may lose both the wisdom tooth and the tooth next to it because of extensive decay. Maxillary or posterior dentary teeth more recurved, denticles present on the anterior carinae. Close association of shark teeth with a vertebrate skeleton is yet another type of fossil record that may indicate shark feeding. Red, swollen areas in a child's mouth or dark spots on the teeth are signs of tooth decay. There also will be worse staining of the teeth and some risk of tooth loss from caries because of the sugar in chewing tobacco. It is easy for tiny amounts of food to get trapped in the tiny dents or fissures, and if you do not brush them thoroughly, bacteria can build up and start to decay the tooth. The pain is aggravated by eating, gum chewing, teeth clenching, or yawning. In nonmammalian vertebrates, tooth replacement is intimately related to growth. Fluoride helps make teeth strong and prevents tooth decay. The teeth are natural with occlusal amalgam fillings in teeth 30 and 31. These can expose your baby's teeth to harmful acids, which can attack the newly formed teeth and cause decay. Dental caries occur when bacteria destroy the enamel surface of the tooth and cause decay. He sucked in his breath through his teeth, biting down hard to try and suppress the throbbing left behind by a revolver's bullet's passage. The sugar in milk and juices will eat at your child's teeth and may cause decay. Some malocclusions cannot be treated successfully without removing permanent teeth, though tooth removal is contraindicated in other situations. If the teeth are not cleaned properly they may be vulnerable to tooth decay causing cavities, or to gum disease. Titan triggerfish are armed with powerful jaws and teeth suitable for chewing bony corals divers should steer clear of them! Dental caries or sugar-bacterial tooth decay is largely preventable. The core structure of the tooth is composed of dentine. Wisdom teeth are the last teeth at each end of the upper and lower gums, at the very back of the mouth. Synonyms fang, denticulation 1.1 A hard, pointed structure in invertebrate animals, typically functioning in the mechanical breakdown of food. （无脊椎动物的）牙，齿 1.2teeth Genuine force or effectiveness of a body or in a law or agreement. 〈喻〉（机构的）真正力量；（法律、协定的）真正作用，有效性 the Charter would be fine if it had teeth and could be enforced 如果《宪章》能有效实施的话，那就好了。 Example sentencesExamples And the regulatory body that existed before he came to power, has no teeth and can't stop him. This is not like treaty claims, because the Maori Land Court will have teeth and power in a way that the Waitangi Tribunal does not. What teeth do police authorities have when they cannot challenge on operational matters? Many of the rules seem to lack teeth when it comes to punishing erring hospitals that continue to dump their waste with impunity. Corporations are attracted to the WTO to get business-friendly trade rules because it has teeth. The act gave teeth to a series of treaties designed to protect migratory birds, including the swan family, from extinction. I think Bingley needs a central organisation, with some teeth. In fairness the industry and the Scottish executive now recognise there are problems, but tough regulatory controls with real teeth and sanctions are needed. It goes a little way to doing that, by giving the regulators some power and some teeth. If we want the UN to rule, we have to give the UN teeth: as you say, military power. 2A projecting part on a tool or other instrument, especially one of a series that function or engage together, such as a cog on a gearwheel or a point on a saw or comb. （工具、器具的）齿状物 Example sentencesExamples Desargues proposed cycloidal teeth for gear wheels in the 1630's. A toothed rack rail is laid in the middle of the track on the slopes and the pinions attached to the engine engage with the teeth of the rack bars and enable the engine to pull itself and its load up. Synonyms prong, point, tine, cog, ratchet, sprocket 2.1 A projecting part on an animal or plant, especially one of a jagged or dentate row on the margin of a leaf or shell. （动、植物的）齿状物（尤指叶子或贝壳边缘） Example sentencesExamples There are close-ups of leaf teeth and scales, for examples, and composite photos of Quercus and Carya fruits. The fleshy stems are angled with soft teeth, and no leaves. The cone shell has modified teeth, like small poison-loaded harpoons, which it shoots out if disturbed. Only a few shells measured had teeth or conspicuous apertural thickening, and these features were not measured in this study. The angiosperms range from small leaves with chloranthoid teeth to larger leaves of the Ficophyllum type. Or a garden that had plants with teeth, rather than pretty petals. The margin of the aloe leaf is usually lifted with teeth having a sharp terminal spine on the end of each leaf. 3An appetite or liking for a particular thing. 口味；爱好 what a tooth for fruit a monkey has! 猴子是多么的爱吃水果啊！ 4Roughness given to a surface to allow color or glue to adhere. 粗糙面（颜料、胶水能黏附于上） Example sentencesExamples Slick surfaces often needed to be sanded to give them tooth so paint and other materials will adhere better. Phrases fight tooth and nail Fight fiercely. 凶猛地打斗 Example sentencesExamples The CIA battles tooth and nail over material from fifty years ago. The people who fought tooth and nail to keep VCRs off the market will have a veto over all new digital television devices, including digital television devices that interface with personal computers. ‘We received our five star tidy town rating two years ago and fought tooth and nail to maintain it,’ he said. The most hoggish CEOs of the year, though, are America's media moguls, who fought tooth and nail against a pay raise that was being sought by the people who write the scripts for their movies and TV shows. Pinned almost on their own line, Naas were unable to regain possession for almost nine agonising minutes of additional time as an heroic defence fought tooth and nail to keep the opposition out The Algerian and Egyptian governments have fought tooth and nail for years to prevent the installation of Islamic law as the only form of law in their countries. He did not know me from Adam, but he fought tooth and nail as if I was his property. Both these teams were unbeaten going into this Division Two top of the table clash and it was easy to see why as both fought tooth and nail to maintain their respective 100 per cent records. When the oil industry appeared they fought it tooth and nail. Everyone fought tooth and nail to keep the families here and we thought they had a chance. ‘Every piece offered… they fought tooth and nail to keep it in,’ said one official involved in putting together the speech. He has fought tooth and nail to ensure the Parliament is more democratic, has more powers and is more relevant to people out there’. But the Ulster Champions were in no mood for waving white flags instead they got bodies behind the ball, pushed themselves that extra inch and fought tooth and nail not to concede. And it must be remembered that each step from rhetoric to reality was fought tooth and nail by those who preferred the status quo, and often fought with eerily similar rhetoric. Since the industry has fought tooth and nail against mandatory COOL legislation, there is no way for them to know which chicken came from which kill plant. Spain and Poland had fought tooth and nail over their voting status in the European Council as agreed in Nice in 2000, which gave them each almost the same number of votes as much more populous countries like Britain, France and Germany. They kept plugging away, fought tooth and nail for every ball, got stuck in when it mattered, kept the heads up, the only problem was their level of finesse simply eluded them on the day. The airlines fought tooth and nail against passenger-bag matching because it would slow down the check-in process. The Today programme is an agenda setting news programme, that I've fought tooth and nail and to be able to listen to in the ‘Ladies Gym’ - as they insist on calling it - in my gym. She said: ‘We have fought tooth and nail for a new pool.’ get (or sink) one's teeth into Work energetically and productively on (a task) 积极而富成效地工作；专注于 the course gives students something to get their teeth into 这门课程能给学生一些值得深究的东西。 Example sentencesExamples For those who like a good laugh, there's a lot to sink your teeth into. It's meaty material and I think any actor loves to do stuff you can sink your teeth into. Occasionally along comes an example of populism run amok the critics can sink their teeth into. To widen the choice for the guests and ensure that there are more than just juicy fish chunks for guests to sink their teeth into, buffet lunch and dinner are also being served during the festival days. Old fans won't be disappointed but more importantly, new fans will find something worthwhile to sink their teeth into. He has only had supporting roles to date, but for this production was chief baddie, the Sheriff of Nottingham, and it was one he really got his teeth into. If you love the minimalist adventurism of Kompakt but need just a little more sensitive pop structure to sink your teeth into, then this comp's for you. Serves me right for picking an easy read and not getting my teeth into something substantial. And literary fiction has to have something that the present or prospective PhD students can get their teeth into. What does enter my mind is when I see a particularly difficult challenge the country's facing and I see something that I disagree with, I think, Gosh, I wish I could sink my teeth into that. With over 30 clubs and societies to choose from, there is plenty on offer in Sligo IT for students to get their teeth into. But set it during the October Crisis and that's something people can sink their teeth into. My fingers drum on the desk as I pour over CNN and Newsday looking for stories to sink my teeth into. And it really is playing against type, which my guess is, for you, really a role you could sink your teeth into. This story has been a little dicier for reporters to sink their teeth into because frankly you don't know quite what you're getting into. This is the kind of contest I can really sink my teeth into. Now there's a sociological exercise I could sink my teeth into. So if you desire a yummy book to sink your teeth into but can't commit to a Tolstoy, here is a list of five children's novels I have recently read and greatly enjoyed. But do take a look, there is certainly something for you to sink your teeth into. Here are four ready-made trips to sink your teeth into. in the teeth of 1Directly against (the wind). 逆（风） Example sentencesExamples Pam's life was full and happy; she took pleasure in natural history and the creation of a garden in the teeth of regular exposure to south westerly winds. We were fishing right in the teeth of a big wind on Chateau Lake. Yesterday was a very long day in the teeth of a cold wind and the occasional shower. Some loon, an observer would say, mumbling to himself, clothing torn, hair matted with blood, the cut over his right eye probably still bleeding, staggering towards another impossible hill in the teeth of an impossible wind. My brothers and sister and I would run out of the waves, blue with cold, get dressed in the teeth of whatever wind was blowing that day and retreat somewhere ‘out of the wind’ for a picnic lunch. It's cold outside, and I won't be climbing those valleys today, in the teeth of that wind which always seems to be funnelling down from the colder heights. 1.1In spite of or contrary to (opposition or difficulty) 顶着，不顾（反对，困难） we defended it in the teeth of persecution 尽管会遭受迫害，我们仍为其辩护。 Example sentencesExamples But it is hard to imagine him miscalculating that it could be done in the teeth of active opposition from the other political parties, the electorate, and a somewhat sullen defence force. This has happened in the teeth of some very vocal opposition, mine included. … The Prime Minister has been right, and brave, to introduce market pressures into higher education by pushing through university top-up fees in the teeth of opposition from his egalitarian Chancellor. Plans to create a school at Wellesley Park in the teeth of fierce opposition led to huge protests. In virtually all cases this was pushed through from below, in the teeth of determined opposition from the national leaderships, particularly UNISON and the FBU. Tomorrow our minimum wage, the one we introduced in the teeth of Tory opposition is going up again - to £4.50. The project began last Friday in the teeth of furious Polish opposition; the Poles regard it as a snub and stand to lose out financially because they will not be able to levy tariffs on the pipeline. We brought in the National Curriculum, testing, independent inspections and greater choice, all in the teeth of outright opposition from Labour. Those committed to technological progress, therefore, are attempting to make their societies more just, more efficient and more productive in the teeth of religious opposition. Last year, the producers had agitated against this and had it removed in the teeth of opposition from exhibitors. The reform of local and central government was carried through in the teeth of opposition from the Milanese patricians, who lost their commanding position in the state's administration. Those who marched, therefore, did so out of a profound sense of conviction that this was an unjust war and a crime against humanity and in the teeth of almost universal opposition from the political establishment. Bradford Council awarded Brighton-based UZ a three-year contract to run the annual festival in the teeth of opposition from local organisers who founded the event and ran it on a not-for-profit basis for many years. Over 300,000 miners went out on strike to defend their living standards in the teeth of opposition from their union leaders. One of the things about the Scots coming to Ulster in 1609 / 1610, was that they received grants of Plantation lands in the teeth of opposition of many English servitors in Ireland. For the first time in two generations there is the chance for a party that embodies those hopes to win parliamentary seats in England and Wales in the teeth of opposition by Labour Party leaders. The Kirk is likely to approve limited embryo research in the teeth of determined opposition from traditionalists at this year's General Assembly. The sad outcome is that the operators could afford to fly in the teeth of all oppositions and put the system into use as scheduled. And secondly, I cannot imagine that it can be anything except deeply detrimental to do this in the teeth of Federation opposition, as opposed to through as much consultation and examination of the issues as possible. The approval, although recommended by the planning officers' report, came in the teeth of opposition from district councillors, parish councillors, residents and community groups. Origin Old English tōth (plural tēth), of Germanic origin; related to Dutch tand and German Zahn, from an Indo-European root shared by Latin dent-, Greek odont-. noun.1 phr.
随便看	supernumerariness supernumerary supernumeraryship supernumerate supernumerous super-obese super-obesity superoccipital super-octave superonerate superorbital superorder superorders superordinal superordinary superordinate superordinated superordinate goal superordinates superordinating superordination superordinations superorganic superorganism superosculate