Focusing properties of Gaussian beams passing through a bifocal lens;
高斯光束通过双焦透镜的聚焦特性
It's definitely a modern-day bifocal lens.
它绝对是现代的双焦镜片
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
flat-top plastic bifocal
平顶塑料双焦点透镜
He focused his binoculars on the bird.
他把双筒远镜的焦点对准在那只鸟上。
The field glasses adjust with a screw.
双筒望远镜是用一个旋钮调节焦距的。
He took out the binoculars and adjusted the focus.
他取出双筒望远镜并调整了焦距。
autofocus zoom lens
自动聚焦变焦距镜头
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。
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。
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
front cell focusing
【光】前置镜组封焦
variable focal length (cylindrical) lens
变焦(距)(圆柱)透镜
long focus lens
长焦距（望远）镜头
manual zoom lens
(镜头)手控可变焦距透镜
Eyeglasses having trifocal lenses.
有三焦距镜片的眼镜
binocular microscope
双目显微镜,双筒显微镜
A binocular or field glass.
双目镜，双筒望远镜
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