1.
best image plane of zoom lens
变焦距物镜的最佳像面
2.
image plane displacement of zoom lens
变焦距物镜像面位移
3.
variable focal length (cylindrical) lens
变焦(距)(圆柱)透镜
4.
autofocus zoom lens
自动聚焦变焦距镜头
5.
manual zoom lens
(镜头)手控可变焦距透镜
6.
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快速变焦距手术显微镜
7.
rear-controlled zoom lens
背面调整变焦距透镜
8.
auto iris zoom lens
自动光圈变焦距镜头
9.
zoom stereomicroscope
快速变焦距立体显微镜
10.
macro teleconverter
增距式微距附加镜﹝使标准镜头变成微距而保留最近封焦距离﹞
11.
universal zoom operation microscope
通用型变焦距手术显微镜
12.
The focal length differs with the thickness of the lens
焦距长底随透镜的厚度而变化。
13.
long focus lens
长焦距（望远）镜头
14.
Eyeglasses having trifocal lenses.
有三焦距镜片的眼镜
15.
They have a focal length, and where an image is formed depends on a combination of the focal length and the distance between the object and the lens.
透镜有焦距，而影像形成的位置，取决于焦距及物体与透镜距离的组合。
16.
Lifting up her camera, she took out a zoom lens and put it on.
她举起照相机，取出一个变焦距镜头换上。
17.
Study on Liquid Lens Technology and Its Application in Micro Zoom Optical System
液体透镜技术及其在微型变焦距系统中的应用
18.
Focal length: The distance between the centre of a lens and its principal focus.
焦距:镜头中心与其主焦点的距离。