1.
It's definitely a modern-day bifocal lens.
它绝对是现代的双焦镜片
2.
I know. And bifocals weren't invented until the mid-1 700s.
我知道,而且双焦镜片是在 1700年中才发明出来的
3.
flat-top plastic bifocal
平顶塑料双焦点透镜
4.
He focused his binoculars on the bird.
他把双筒远镜的焦点对准在那只鸟上。
5.
The field glasses adjust with a screw.
双筒望远镜是用一个旋钮调节焦距的。
6.
He took out the binoculars and adjusted the focus.
他取出双筒望远镜并调整了焦距。
7.
autofocus zoom lens
自动聚焦变焦距镜头
8.
Methods: Laser scanning confocal microscope combined with immunohistochemical double labeling methods were used.
方法应用激光共聚焦显微镜结合免疫组织化学双标技术。
9.
a Binocular auto focus camera with marvelous effects, a masterpiece, is easy to handle.
精心杰作双镜头自动聚焦相机使用简便，效果极佳。
10.
Propagation Properties of Partially Coherent Flat-topped Beam Passing through Astigmatic Lens;
部分相干平顶光束经过双焦距薄透镜的传输特性研究
11.
front cell focusing
【光】前置镜组封焦
12.
variable focal length (cylindrical) lens
变焦(距)(圆柱)透镜
13.
long focus lens
长焦距（望远）镜头
14.
manual zoom lens
(镜头)手控可变焦距透镜
15.
Eyeglasses having trifocal lenses.
有三焦距镜片的眼镜
16.
binocular microscope
双目显微镜,双筒显微镜
17.
A binocular or field glass.
双目镜，双筒望远镜
18.
Propagation properties of partially polarized,partially coherent vectorial cosh-Gaussian beams through bifocal lens
部分相干部分偏振矢量双曲余弦-高斯光束通过双焦透镜的传输特性