focus

英 ['fəʊkəs] 美 ['foʊkəs]

• n. 焦点；焦距；中心
• v. （使）集中；聚集

双解释义

v. (动词)

1. vt. & vi. (使)集中

   concentrate

2. vt. & vi. 聚集于

   come together at a focus; adjust an instrument, etc. so that it is in focus

3. vt. & vi. 调整(镜头,眼睛)焦点或焦距以便看清

   adjust (a lens, the eye, or lens-like device) to make a clear image

n. (名词)

1. [C]焦点,焦距; 中心

   the point at which beams of light or heat or waves of sound meet after their direction has been changed; a center of attention

详尽释义

n. 名词

1. （活动、注意力、兴趣等的）焦点，中心，重点，集中点
2. 【地震学】震源
3. 【物】焦点
4. 【光】聚焦，对光；对焦点，聚光点，成像清晰点
5. 【光】（镜头的）焦点，焦距
6. 清晰，明确
7. 【医】病灶
8. 【数】（椭圆的）焦点

v. 动词

1. 集中，使集中于一点
2. 使聚焦，使集中于焦点，特别关注
3. 调焦，调（眼睛、镜头等的）焦距，定…的焦点；使（眼睛）注视
4. 限制于小区域
5. 使清晰
6. 聚焦，集中于焦点，注视

英英释义

Noun:

1. the concentration of attention or energy on something;

   "the focus of activity shifted to molecular biology"
   "he had no direction in his life"
   

2. maximum clarity or distinctness of an image rendered by an optical system;

   "in focus"
   "out of focus"
   

3. maximum clarity or distinctness of an idea;

   "the controversy brought clearly into focus an important difference of opinion"
   

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

   "the focus of infection"
   

5. special emphasis attached to something;

   "the stress was more on accuracy than on speed"
   

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

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

Verb:

1. direct one's attention on something;

   "Please focus on your studies and not on your hobbies"
   

2. cause to converge on or toward a central point;

   "Focus the light on this image"
   

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

4. become focussed or come into focus;

   "The light focused"
   

5. put (an image) into focus;

   "Please focus the image; we cannot enjoy the movie"
   

例句

用作名词 (n.)

1. He always wants to be the focus of attention.
   他总想成为注意力的焦点。
2. He took out the binoculars and adjusted the focus.
   他取出双筒望远镜并调整了焦距。
3. The main focus of this manual is the management of fresh ground water resources.
   本指南的主要中心是地下淡水资源的管理。

用作动词 (v.)

1. The noise made it hard for me to focus on work.
   噪音让我无法集中注意力工作。
2. He focused the sun's rays on the paper with a burning glass.
   他用取火镜使太阳光聚集在纸上。

常见句型

用作动词 (v.)

用作不及物动词

S+～(+A)

1. A defect of vision prevented him from focusing accurately.
   视力缺陷使他无法准确聚焦。
2. He must be very tired today, he doesn't seem to focus at all.
   他今天一定很累,他似乎无法专心思考。

用作及物动词

S+～+ n./pron.

1. He focuses the lens of a microscope.
   他调整显微镜的镜片以定焦点。
2. His eyes were so tired that he had difficulty focusing it.
   他的眼睛累了,无法准确聚焦。
1
3. Unless the object is properly focused the photograph will be blurred.
   除非把焦距调准,否则拍出的照片是不清楚的。

用作名词 (n.)

1. The camera has two focuses.
   这部相机有两个焦距。
2. She was the focus of everyone's attention.
   她是大家注意的焦点。
3. He is adjusting the focus of camera.
   他正在调相机的焦距。
4. The coffee shop is the focus of social life in French.
   在法国,咖啡馆是社交生活的中心。

经典引文

• The orbit of a planet..is a broad ellipse in which the sun is..at one focus.

  出自： J. Bronowski

• I raised the beam of my flashlight.., I focused it..on the hole in the yellow ceiling.

  出自： R. Bradbury

• Guy tilted forward his glasses and tried to focus the spectacle before him.

  出自： O. Manning

• He took a little time to focus his eyes properly and decide who I was.

  出自： C. Achebe

• Electrons can be focussed into narrow beams by electrostatic or magnetic lenses.

  出自： H. M. Rosenberg

• I focused much of my distemper on London: I noticed only its bad qualities.

  出自： C. Priest

常用短语

用作动词 (v.)

focus on (v.+prep.)

把…作为兴趣中心 like sth most
focus on sth
A near-sighted person cannot focus accurately on distant objects.

一个近视的人不能够准确地调节眼睛以看到远处物体。 focus sth on sth
He focused the sun's rays on a paper with a burning-glass.

他用一面凸透镜把阳光聚焦在纸上。
If you focus bright sunlight on dry wood with a glass, it will start burning.

假如你用镜子将强烈的阳光聚焦于干燥的木头上,它便会燃烧起来。 focus on sth/v-ing
Today we're going to focus on the question of homeless people.

今天,我们主要讨论无家可归者的问题。
Many firms are focusing on increasing their markets overseas.

许多商行都在注意在国外扩大市场。 focus sth on sb/sth
He focused his mind on his lessons.

他把心思集中在功课上。
You should focus your attention on your work.

你应该聚精会神地工作。
We must focus our attention on the question of reducing costs.

我们必须将注意力集中在降低费用的问题上。
When the coin failed to appear, attention was focused once more on poor Lebeau.

当找不到那枚古币以后,大家的注意力再次转到勒保身上。
All eyes were focused on him when he came in.

他进来时大家都注视着他。 focus on sth/v-ing
Today, we're going to focus on the relationship between freedom and necessity.

今天,我们将集中讨论自由和必然之间的关系这一问题。
This year our meeting focuses on the question of children's rights.

今年我们会议的中心问题是儿童权益问题。
The show focuses on making fun of politicians.

这场演出旨在嘲弄那些政客。

词汇搭配

用作动词 (v.)

～+名词

• focus one's attention 集中注意力
• focus one's efforts 集中精力
• focus the lens of a microscope 调节显微镜的镜片
• focus one's thoughts 集中思想

～+副词

• focus accurately 准确地调节
• focus properly 调整

～+介词

• focus on〔upon〕 使集中于焦点,使集中在…上; 强调,着重
• focus on the interaction between 着重说明…之间的相互作用
• focus on a problem 集中在某个问题上
• focus the camera on 把照相机的焦点对准…
• focus the sun's rays on 使阳光聚焦于…

用作名词 (n.)

动词+～

• adjust the focus 调整焦点
• take the focus 量焦点

形容词+～

• real focus 实焦点
• right focus 正确的焦点

介词+～

• in focus 对准焦距
• out of focus 没对准焦距

～+介词

• the focus of sth 某物的中心

词语用法

1. focus on sth表示“集中于某事”；
2. focus作“中心，焦点”的解释时，用词范围很广，常被滥用，需注意。

v. (动词)

1. focus用作名词时原始意义是“火炉”,引申为“焦点”,转化为动词则为“(使)聚焦”,“(使)集中”。即“调整…的焦点或焦距以便看清”,引申则表示“使(注意力等)集中于某物”。
2. focus用作及物动词时,可以接望远镜、焦点等作宾语,也可以接阳光等作宾语,还可以接目光等作宾语。focus用于比喻作“致力于”解时,则可以接mind, attention等作宾语。
3. focus也用作不及物动词,这时常和介词on连用,表示“聚焦于…”“致力于…”等。

词义辨析

v. (动词)

focus, centre, centralize, concentrate

• 这组词的共同意思是“集中”。其区别在于:centre强调事或物所集中的那个中心点; focus强调同类事物汇集在一点上,融成一体; centralize则用于那些能集中又能分散的事或物,尤指集中权力或类似的东西; concentrate强调人类为达到目的而采用的技巧和方法、纪律及为此所做出的努力。例如:
• The conversation was centred on the election.会谈的中心问题是选举。
• The troops concentrated near the station.部队集结在车站附近。
• He focused the sun's ray on a piece of paper with a burning-glass.他用一面凸透镜把阳光在纸上集成焦点。
• She is trying to centralize all power into her own hands.她力图把所有权力集中在自己手中。

concentrate，focus

• 这两个动词均有“集中，聚集”之意。
• concentrate指把人或物集中在一起，也可指把精力或注意力集中于某一事物上。
• focus侧重指把光、热、射线等集中于一点，也可指把思想或精力等集中于某人或某事情上。

词源解说

• ☆ 17世纪40年代进入英语，直接源自古典拉丁语的focus，意为炉床，壁炉。

近反义词

【近义词】

• concentrate
• center
• middle

【反义词】

• blur 弄脏