His figure looks very funny in the concave mirror.
他的样子在凹镜里显得非常可笑。
The diameter of a sphere is four times the focal length of a concave mirror cut from it.
凹面镜如果是从圆球上切下来的，圆球的直径会是凹面镜焦距的四倍。
Collectively, the faces of all the tiny airborne ice crystals act as a giant concave mirror.
总的来说，所有微小的空中冰晶的面孔扮作一块巨大的凹镜。
The laser consists of a semiconductor laser with single mode fiber coupled output, polarization controller, PLZT electro-optic ceramic deflector, and output concave mirror.
该激光器由带单模尾纤输出的半导体激光器、光纤偏振控制器、PLZT电光陶瓷偏转器和输出凹面镜等组成。
Observation eyepiece consists of concave mirror and a separate gate is formed, in the eyepiece can be seen at the same time the two semicircle color, its left for the sample color.
观察目镜由凹镜和分隔栅组成，在目镜中可同时看到二个半圆色，其左边的为试样颜色。
镜子呈凹面。
镜子呈凹面。
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