- concave polygonn.凹多边形;
- concave mirrorn.凹透镜;凹镜;
- lens subluxation晶状体半脱位
- single lens reflexn.单镜头，反光照相机;
- 双语例句
1、
Some are flared - that is, thicker at the rim than the center, like a concave lens.
有些呈喇叭形 ─ ─即边缘较中心厚, 类似凹透镜.
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2、
A concave lens causes rays to diverge as though they are coming from a focal point.
发散透镜使光线分开,就好象从焦点上发出来的那样.
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