focus

(pl. focuses, foci )

【物】焦点

焦距; 对焦点, 聚焦, 配光

(问题, 活动、兴趣等的)中心

【医】病灶

(地震的)震源

焦点范围

螺旋极点

美国中西部考古学系统的分类单位

疫源地

focus electrode

the focus of world's attention

focus

中心点

焦点

中心，集中点

to be a focus of attention

"Because of his strange clothes, he immediately became the focus of attention when he entered the office."

使集中于焦点；集中

to focus one's mind on work

You must try to focus your mind on work and study. (喻)

All eyes were focused on the speaker. (喻)

调焦距

This photograph looks funny; I think you forgot to focus the camera.

focus

(兴趣活动等的)中心, 焦点, 焦距, [医]病灶, [地](地震的)震源

聚焦, 注视

使集中在焦点上, 定焦点, 调焦, 集中

focus

a point of convergence of light or other electromagnetic radiation, particles, sound waves, etc, or a point from which they appear to diverge

another name for focal pointanother name for focal length

the state of an optical image when it is distinct and clearly defined or the state of an instrument producing this image

the telescope is out of focus

a point upon which attention, activity, etc, is directed or concentrated

a fixed reference point on the concave side of a conic section, used when defining its eccentricity

the point beneath the earth's surface at which an earthquake or underground nuclear explosion originatesSee epicentre

the main site of an infection or a localized region of diseased tissue

to bring or come to a focus or into focus

to fix attention (on); concentrate

focus

1. the concentration of attention or energy on something; "the focus of activity shifted to molecular biology"; "he had no direction in his life"

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2. maximum clarity or distinctness of an image rendered by an optical system; "in focus"; "out of focus"

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3. maximum clarity or distinctness of an idea; "the controversy brought clearly into focus an important difference of opinion"

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4. a central point or locus of an infection in an organism; "the focus of infection"

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5. special emphasis attached to something; "the stress was more on accuracy than on speed"

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6. a point of convergence of light (or other radiation) or a point from which it diverges

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7. a fixed reference point on the concave side of a conic section

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1. direct one's attention on something; "Please focus on your studies and not on your hobbies"

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2. cause to converge on or toward a central point; "Focus the light on this image"

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3. bring into focus or alignment; to converge or cause to converge; of ideas or emotions

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4. become focussed or come into focus; "The light focused"

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5. put (an image) into focus; "Please focus the image; we cannot enjoy the movie"

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