lens

英 [lenz] 美 [lɛnz]

lens 透镜，镜片

来自拉丁文lens,豆荚，词源同lentil.因镜片如同两面凸出的豆荚而得名。

lens: lens: [17] The Latin word for a ‘lentil’ was lēns; and when 17th-century scientists wanted a term for a round biconvex (lentil-shaped) piece of glass, they needed to look no further than lens. English lentil [13] itself comes via Old French from Latin lenticula, a diminutive form of lēns.
=> lentil
lens (n.): 1690s, "glass to regulate light rays," from Latin lens (genitive lentis) "lentil," on analogy of the double-convex shape. See lentil. Of the eye from 1719.
In the vernacular of the photographer, anyone crowding to the front of a group, staring into the lens, or otherwise attracting attention to himself is known as a "lens louse." ["American Photography," vol. 40, 1946; the term dates from 1915]

2. The autoexposure button is awkwardly placed under the lens release button.: 自动曝光按钮安装在镜头脱卸按钮下面，十分不便。

3. Your camcorder should have these basic features: autofocus, playback facility, zoom lens.: 你的便携式摄像机应该具备以下基本功能：自动聚焦、回放功能、变焦镜头。

4. He took off his spectacles and rubbed frantically at the lens.: 他摘下眼镜，疯狂地擦着镜片。