1.
a concave lens [mirror]
凹透镜 [凹面镜]
2.
Any of the lenses, prisms, or mirrors of an optical instrument.
光学镜光学仪器的透镜、棱镜或平面镜
3.
Some telescopes do not use a lens at the front. They use a curved mirror at the back. A curved mirror is better than a lens in some ways.
一些望远镜的前部不用透镜，而在后面装上一个曲面镜，曲面镜在某些方面要比透镜好。
4.
All three of them use mirror, not lenses at the front.
这三台望远镜前部用的都是曲面镜而不是透镜。
5.
A simple periscope uses mirrors.
简单的潜望镜使用平面镜。
6.
The water at the bottom was like a mirror.
井底的水像一面镜子。
7.
There is an air-conditioner in the room.
卫生间里有一面镜子。
8.
One of the mirrors is fully silvered.
其中一面镜子镀满白银。
9.
She had a magic mirror and often stood before it and said,
她有一面魔镜，常站在魔镜前说：
10.
then she put them up and looked out under them.
然后她又抬高眼镜从镜片下面看。
11.
flange focal distance
镜座距，指镜头座与菲林平面的距离
12.
The Evil Queen has a magic mirror.
邪恶的皇后有一面魔镜，
13.
rear-controlled zoom lens
背面调整变焦距透镜
14.
best image plane of zoom lens
变焦距物镜的最佳像面
15.
image plane displacement of zoom lens
变焦距物镜像面位移
16.
Cameras have lenses at the front.
照相机的前面装有镜头。
17.
retake a shot, scene, etc
重拍一个镜头、 场面等.
18.
surface finish testing microscope
表面光洁度测量显微镜