名詞 lens:

1. a transparent optical device used to converge or diverge transmitted light and to form images
   同義詞：lense, lens system
2. genus of small erect or climbing herbs with pinnate leaves and small inconspicuous white flowers and small flattened pods: lentils
   同義詞：genus Lens
3. (metaphor) a channel through which something can be seen or understood
4. biconvex transparent body situated behind the iris in the eye; it focuses light waves on the retina
   同義詞：crystalline lens
5. electronic equipment that uses a magnetic or electric field in order to focus a beam of electrons
   同義詞：electron lens

1. In this operation the surgeons implant a new lens (in the eye).
   醫(yī)生在這次手術(shù)中給病人(眼球)植入了新的水晶體。
2. Don't smear the lens; I've just polished it.
   別把鏡頭弄臟了，我剛剛擦過(guò)。
3. The camera lens must be screened from direct sunlight.
   照相機(jī)的鏡頭不可受到陽(yáng)光的直射。
4. This lens can magnify 20 diameter.
   這個(gè)透鏡能放大20倍。
5. Some adjustment of the lens may be necessary.
   可能有必要調(diào)節(jié)一下鏡頭。
6. He uses lens to make things appear clearer.
   他用鏡片以便看東西更清楚些。
7. The lens is often used to make telescopes.
   鏡片常被用來(lái)做成望遠(yuǎn)鏡。

lens

n.（名詞）
【復(fù)數(shù)】 lens.es
A ground or molded piece of glass, plastic, or other transparent material with opposite surfaces either or both of which are curved, by means of which light rays are refracted so that they converge or diverge to form an image.
透鏡，鏡片：一片磨光的或塑造成的玻璃、塑料或其它透明的物質(zhì)，有兩個(gè)相反的表面，其中的一個(gè)或兩個(gè)都成曲線形，通過(guò)這種方式可將光線折射以便聚集或發(fā)散來(lái)形成圖象
A combination of two or more such pieces, sometimes with other optical devices such as prisms, used to form an image for viewing or photographing.Also called compound lens
（照相機(jī)、望遠(yuǎn)鏡等的）鏡頭：由兩片或更多的透鏡組成的聯(lián)合體，有些還要加上其它的光學(xué)儀器，如棱鏡，用來(lái)成像以便觀看或攝影也作 compound lens
A device that causes radiation other than light to converge or diverge by an action analogous to that of an optical lens.
輻射鏡：一種通過(guò)與光學(xué)鏡片類似的原理使射線而不是光線聚集起來(lái)或發(fā)散的裝置
A transparent, biconvex body of the eye between the iris and the vitreous humor that focuses light rays entering through the pupil to form an image on the retina.
晶狀體，水晶體：眼球中一種透明的雙面凸體，位于虹膜與玻璃體之間，它可使穿過(guò)瞳孔進(jìn)入眼球的光線聚集在視網(wǎng)膜上來(lái)形成圖象
v.tr.（及物動(dòng)詞）
lensed,lens.ing,lens.es 【非正式用語(yǔ)】
To make a photograph or movie of.
給…攝影，給…拍照

來(lái)源：
New Latin lôns
現(xiàn)代拉丁語(yǔ) lôns
from Latin [lentil (from the shape of a double convex lens)]
源自 拉丁語(yǔ) [小扁豆，濱豆（因其形狀象雙凸鏡）]

【引伸】
lensed
adj.（形容詞）