透镜

• Lens stereoscopes are practical for field use or for observing magnified details .
  透镜式立体镜适合于野外使用或者观察放大的细节。
• One case of particular importance corresponds d=o, i.e. the two lenses are in contact .
  一个特别重要的情况是do，即两个透镜相接触。
• These simple lenses far surpassed the best microscopes anywhere else in the world !
  这些简单的透镜胜过世界上任何地方最精良的显微镜。
• Every lens has a mounting flange with which it is attached to the camera body .
  每个透镜都有一个安装凸缘，依靠它才能把透镜安装到相机上。
• Imagine that we have some sort of lens system which forms an image of an extended object .
  设想我们有某种透镜系统，它对一个扩展物体成象。
• Even poor lenses and uncritical eyes can always seen something on the moon .
  纵然用劣质透镜和没有鉴别力的眼睛也总能在月球上看到一些东西。
• Objectives which consist only of one lens can be used for visual and photographic observations .
  由单透镜组成的物镜可作目视和照相观测用。
• Some of the advantages of lens stereoscopes are compactness, simplicity and ready portability .
  透镜式立体镜的一些优点是坚固、简单、轻便。
• The question was open as to what shape of lens would so focus in the coming rays .
  什么形状的透镜能起这样的聚焦作用，还是一个没有解决的问题。
• There is a direct relation of this surface to the distribution of a lenticular sandstone which overlies it .
  这个面直接控制着它上面的透镜状砂岩的分布。