1The centre of interest or activity.

这一代人使环境成为关注焦点。

1. 1.1 An act of concentrating interest or activity on something.
   重视
   our focus on the customer's requirements

   我们对消费者需求的重视。

   Example sentencesExamples

   • Yelina shifted her focus and began concentrating on her breathing.
   • I relish the hours when my entire focus isn't concentrated on breathing.
   • To be charitable, perhaps his paranoid focus on who'd been criticising Latham obscured his focus.
   • Another attack also failed but it served a purpose of concentrating the focus of the Japanese on these torpedo squadrons.
   • Focus on your own feelings and share them with your partner, so you won't lose the focus of your own body.
   • He concentrated, pulling his focus inward and trying to see if there was something wrong inside that would make him lose control.
   • The viewer has to have a greater focus, a greater concentration, to be overwhelmed by a work of visual art or literature.
   • A line-man likes to narrow his focus and concentrate on his assignments late in the week.
   • I concentrated all of my focus into my magic as I formed a fireball in my hand.
   • The breakup ruined my concentration, my focus, my ambition at the company.
   • Our focus concentrated on those clutch sizes thought to be vulnerable to the spread of siblicidal behavior.
   • All my focus is concentrated on the back that's slowly going further away from me.
   • Keep your entire focus of concentration on the muscles that you're stretching and how they feel at that moment.
   • Jesse refused to meet her eyes, his focus concentrating on her silver hoop earrings.
   • But James would also narrow the focus to concentrate solely on the moral gains of unrequited love.
   • I just kept my focus and concentrated on striking as much as I could; I didn't worry about what Wendy was doing.
   • The focus has been on extensive training programs to build the work force, he reports.

   Synonyms

   emphasis, accent, priority, attention, concentration

   subject, theme, concern, subject matter, topic, issue, question, text, thesis, content, point, motif, thread

   substance, essence, gist, matter
2. 1.2Geology The point of origin of an earthquake.
   〔地质〕（地震的）震源，震中。比较EPICENTRE
   Compare with epicentre

   Example sentencesExamples

   • This result strongly agrees with the upward migration of seismic foci in the volcanic edifice, which has been found to precede recent flank eruptions.
   • The geographic point directly above the focus is called the earthquake epicenter.
3. 1.3Medicine The principal site of an infection or other disease.
   〔医〕病灶
   Example sentencesExamples

   • The macroscopically apparent thrombosed vessels in case 3 contained tumor emboli and multiple foci of infarction.
   • Multiple foci of infection, several millimeters in diameter, were seen in many organs.
   • There was extensive embolization to the brain and multiple foci of Aspergillus infection in kidneys and adrenal glands.
   • In addition, a microscopic focus of transitional cell carcinoma was seen adjacent to the main tumor.
   • An identifiable focus of primary infection should also be addressed when possible.

2mass noun The state or quality of having or producing clear visual definition.

他的脸有些模糊。

1. 2.1
   another term for focal point

   Example sentencesExamples

   • Underrepresented middle-school children are the focus of a new optics outreach program.
   • Breman's central focus is on the working poor at the bottom of Gujarat's society.
   • The case story is often the immediate or central focus of the consultation.
   • The use of collinear beam geometry facilitates the alignment of the overlap of the two foci and ensures high image quality.
   • Once you pinpoint your focus, it's time to do more homework about the industries and companies in which you want to find work.
   • The probability for such an event occurring is only significant at the plane of focus, where photon flux is the highest.
   • Their focus was always upon the general rather than the particular.
   • The focus vanished and the blaster returned to room temperature.
   • As a result, the current focus for tunable lasers is on circuit-switched applications.
   • They primarily felt that education is a necessary and central focus for building a strong nation.
   • Angus has composed the motifs in defined coloured areas with no central focus.
   • While Zippy has the attention span of a goldfish, his wife has the focus of an electron microscope.
   • The gentleman moved his focus to the intersection between the main and back halls that led to the gardens.
   • I don't value a more male focus above more female focus.
   • Her entire focus was concentrated on the small object which rested at the exact center of the room, her one and only focal point.
   • Hence, the character of these variables is one central focus of our current research into OS projects.
   • With respect to the definition of business purpose and business mission, there is only one such focus, one starting point.
   • The central and overriding focus of this project is dealing with racism face-to-face.
   • Why has religion been such a central preoccupation and focus of debate in political science over the last 20 years?
   • Yet, an authentic transgenerational focus radiating from a cultural lens has been lacking.
2. 2.2count noun The point at which an object must be situated with respect to a lens or mirror for an image of it to be well defined.
   成像清晰点
3. 2.3count noun A device on a lens which can be adjusted to produce a clear image.
   （透镜）调焦装置
   Example sentencesExamples

   • The microscope has a motorized focus, allowing a minimum step resolution of 25 nm.
   • Focusing is similar to a traditional roof prism binocular with the right ocular adjustable and a center focus knob.
   • He adjusts the focus of the Carl Zeiss 120 mm macro lens, which allows him to work very close up.
   • Focus on the subject and use the focus lock facility of your camera.
   • The focus can be adjusted slightly in order to sharpen up different parts of the image corresponding to objects at different depths in the scene.
   • Katsukoii slowly turned a knob, which indicated that she was adjusting the focus.
   • These lenses adjust their focus with a patient's eye muscles to give them seamless near or distance vision.
   • He adjusted the focus of the lamp and watched Clark's face contort.
   • Focus on the subject and keep your finger depressed on the focus lock.

3Geometry
One of the fixed points from which the distances to any point of a given curve, such as an ellipse or parabola, are connected by a linear relation.

4Linguistics
An element of a sentence that is given prominence by intonational or other means.

1Adapt to the prevailing level of light and become able to see clearly.

设法调整视力以看清楚一静物。

1. 1.1with object Cause (one's eyes) to focus.
   she focused her eyes on his face

   Example sentencesExamples

   • I focussed my eyes onto each of the signs and grumbled in annoyance.
   • You struggle up in the dark, focusing your eyes in desperation on the digital alarm clock, which tells you that it's 7.30 am.
   • Kino lay back against the wall of the cave, squinting, rubbing and focusing his eyes to get the blind spots out.
   • Her body stiffens as she stares at the TV, focusing her eyes, ears, heart and soul on the screen.
   • Franklin dug through the spoils, focusing his trained eye and pulling out the impotent mushrooms.
   • By then, Kentou was watching it too, trying to focus his eyes onto the blurred shape, trying to make out the features of the body.
   • She wasn't watching the music video; her eyes were focused inward, deep in thought.
   • I think some of the brain which attends to focussing my eyes may have leaked out.
   • Josie's eyes weren't focussed, she wasn't even blinking.
   • It takes a special sort of myopia to focus your eye and see the people who carry out such acts as ‘the oppressed’.
   • It was difficult to focus her eyes, but she saw that he was gazing intently into them.
   • Feeling distinctly sick, he lay back down and focused his eyes, surveying his surroundings.
   • His eyes were focussed somewhere off in the deepening gloom.
   • I had focused my eyes, like staring through glass at something I wasn't worthy of having.
   • Sitting down in a chair, I focused my eyes and senses on your face and learnt the lessons of beauty.
   • As sales on both sides of the Atlantic in early June revealed, a good provenance works wonders in focussing a collector's eye.
   • With ears pricked, eyes were focused just two days later for Minstermen watchers of BBC's less sedate They Think It's All Over.
   • Coughing, she focussed her eyes straight ahead of her and saw a road.
   • The woman tries to focus her eyes, but turns them away after a second.
   • Every few metres the cat stopped and twisted its head around, focussing its yellow eyes on me, checking to see if I was still in pursuit.
2. 1.2with object Adjust the focus of (a telescope, camera, or other instrument)
   调节（望远镜、照相机等器械的）焦距
   they were focusing a telescope on a star

   他们正对着一颗星调节望远镜焦距。

   Example sentencesExamples

   • We went through the business of focussing the camera, and then gave her the portrait and took the 6d.
   • For example, in one puzzle you have to focus a telescope, and to do so you have to add or remove 14 lenses.
   • I focused my Alpha's cameras in on some of the stuff.
   • Arbus focused her camera and triggered the shutter.
   • I focused my camera once more, and again, I went unnoticed.
   • I smiled at the site and focused the camera and snapped a few shots.
   • ‘Just look at me,’ says Juergen, focusing the camera.
   • This instrument can be focused with a wheel that moves the lens tube in and out.
   • She moved closer to the kids and focused her camera.
   • He stopped at the top and focused his camera, snapping a few pictures of the landscape.
   • He likened this to the chances that an out-of-focus microscope could be focused by small vs. large random adjustments.
   • I believe the Shuttle cameras focus everything from a few inches away until infinity.
   • I have written about this many times, but modern auto-focus cameras deliver more ‘out of focus’ shots than manually focussed cameras.
   • ‘Best seats in the house,’ he said, looking up and focusing his camera.
   • So I focused the camera towards Em, and asked her questions.
   • Generally Brill focuses his rock-steady handheld camera on the faces of the doctors, nurses and Gillies himself.
   • Using a remote PC, the operator illuminates the target, focuses the camera, and selects the appropriate analytical tools.
   • Good thing he took the time to focus his video camera on the guy.
   • My heart is seriously about to beat out of my chest, but I focus my camera before I can change my mind and run out the back door.
   • Hundreds of people use auto-focus cameras and there are many people who can't focus their cameras anymore.

   Synonyms

   bring into focus, bring to a focus

   aim, point, turn
3. 1.3 (of rays or waves) meet at a single point.
   （光线，波）聚焦
   Example sentencesExamples

   • These scatter the sun's rays, and prevent them from being focused together into a single bright point.
   • The effect can be seen in attics under ill-fitting tiled roofs, where the sun's rays are focused through chinks between the tiles.
   • In narrow inlets and coves, the wave can become focused or amplified, reaching tens of metres in height.
   • Because gamma rays are hard to focus into sharp images, the science team then used the X-ray telescope on Swift to determine a precise location.
4. 1.4with object (of a lens) make (rays or waves) meet at a single point.
   （光线，波）聚焦
   Example sentencesExamples

   • Telescopes designed to collect and focus X rays from space provide that vision.
   • Others used a magnifying glass to focus the rays of the sun on the base of the wart.
   • When a lens is used to focus the sun's rays onto a piece of paper the distance of the paper from the lens is called the focal length.
   • And they were used for starting fires by focusing the rays of the sun.
   • When a lens system optimally focuses an incoming ray bundle, the spread of passed wavelengths is in focus at a range of points in front of, on, and behind the sensor focal plane.
5. 1.5no object (of light, radio waves, or other energy) become concentrated into a sharp beam.
   （光，无线电波等）集中成束，聚焦
   Example sentencesExamples

   • It produces heat and becomes a very powerful weapon when focused into a laser beam.
   • If you have myopia, your eye is generally slightly out of round, with light rays focusing in front of the retina instead of directly on it.
   • Furthermore, I'm using exercises that keep that stress focused precisely where I want it.
   • It works like your grappling hook did, but instead of string, it uses gravity focused into a ‘beam’ to connect it.
   • Light can focus atoms into simple patterns for etching carbon-coated gold layers.
   • Normally a light beam will focus to a point no smaller than about the size of the light's wavelength.
   • In the deep darkness it moved around quickly, setting up two water glasses on the table while the small light focused away from the two surrounding chairs.
   • The beam was directed into a customized Leica Metallux 3 microscope and focused at the sample surface via the objective lens.
   • The beams of multiple lasers focused in on one point.
   • Designed much like a compound microscope, the electron microscope uses a beam of electrons focused through magnetic lenses.
   • As she watched, the moonlight began focussing, moving, searching.
   • Because the pump laser's light remains focused in a very narrow beam inside the fiber, it does not need to supply so many photons.
   • The lights ceased blinking and focused clearly on the blue floored arena masked with fake fog.
   • The moonbeams coalesced and focused into a single glowing stream.
   • Sykes saw the electricity focus in-between the two prongs that were aimed at him.
   • In that time, the energy had focused and spiked beyond what I have ever felt before.
6. 1.6with object (of a lens) concentrate (light, radio waves, or energy) into a sharp beam.
   （透镜）使（光，无线电波等）聚焦
   Example sentencesExamples

   • The eye has a lens, and even ‘film’ (the retina), which detects light focused by the lens.
   • The broadband IR beam passes through the sample chamber and is focused by a lens onto a spinning filter wheel.
   • The first students to work on the cyclotron in the lab setting modified the magnet to better focus the proton beam.
   • The long focal length portion of the lens focuses to one fovea for viewing in air; the other short focal length focuses below water.
   • Humans, indeed all seeing vertebrates, have so-called simple eyes: they have a single lens system, focusing light to form one, continuous image of the outside world.
   • Because the zone plate focuses to a point, it must match the focal length of the camera.
   • These eyes use a single lens to focus images onto a light detector called a retina.
   • In the simple experiment, a converging lens focuses laser light from two pinholes onto two different photodetectors.
   • The images of the stomata were taken with the microscope focused to the narrowest part lower down in the pore.
   • In this sense, it can easily be seen how a camera's lens always focuses inward at least as much as it does outward toward the subject of the photographer's gaze.
   • The transmitter is physically close to the optical fiber and may even have a lens to focus the light into the fiber.
   • An objective lens focuses the light onto a region approximately 1 mm in diameter and subsequently collects the light returning from the target.
   • Materials called photonic crystals have the potential to focus visible light, but may not work as well with microwaves.
   • The lens stores and then focuses light from the video that you are capturing onto the image sensor located behind it.
   • A lens focuses this light at the back focal plane of the objective to allow collimation at the sample.
   • Lenses on cameras not only focus the image but they may magnify or diminish the apparent size of a scene.
   • Just like a camera lens, the eye's lens focuses light to form sharp, clear images.

   Synonyms

   bring into focus, bring to a focus

2focus onPay particular attention to.

该研究将重点针对威尔士若干地区。

1. 2.1with object Concentrate.
   集中
   an opportunity to focus research on the health needs of the population

   Example sentencesExamples

   • The concentration on punishment damages the national debate by focussing all attention on revenge.
   • The two central planks to the strategy focus firstly on retaining existing customers in its core activities of mortgage lending and savings.
   • Green is the one single colour that focuses directly on the retina, so it's the easiest colour for the eye to see.
   • First, the overall plot focuses upon the hubris of an upper class that thinks itself above the powers of mortality.
   • Two of the fighting stances for each character are based on real world martial arts, and the third style focuses solely on weapon-based combat.
   • This retrospective focuses entirely on works held in British collections, spanning portraits, still lifes and landscapes.
   • For example, the close range shield features quick, multiple hits, while the long-range weapon focuses in on powerful blows.
   • He concentrated, focusing his thoughts on the strange impressions he was receiving.
   • The strategic plan focuses primarily on overall goals of the business and defining the business.
   • According to dharma, or divine law, temple worship is important because it focuses our concentration on God.

   Synonyms

   concentrate, fix, centre, pivot, zero in, zoom in

   address itself to, pay attention to, pinpoint, spotlight, revolve around, have as its starting point

3Linguistics
with object Place the focus on (an element of a sentence).