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- lens of variable focal length 可变焦距透镜
- electrooptic variable focal length lens 电子光学变焦透镜
- variable focal length (cylindrical) lens 变焦(距)(圆柱)透镜
- variable focal length cylindrical lens 变焦(距)透镜
- The automatic adjustment in the focal length of the lens of the eye to permit retinal focus of images of objects at varying distances. 眼调节眼睛瞳孔对焦距的自动调节，以获得不同距离的物体在视网膜上的成像
- Taking photographs of these small deep sky objects require a lens of longer focal length, sometimes a telescope is used instead. 拍摄这些细小的深空天体,必须用较长焦距镜头,甚至要用一支望远镜作为镜头。
- A typical lens has a focal length(f)of 625 mm. 常见镜头的焦距（f）为625毫米。
- Determine the focal length of your lens. 决定你镜头的焦距。
- objective with variable focal length 可变焦距物镜,变焦距物镜
- Variable Focal Length Zoom Lenses 可变焦伸缩镜头
- And even among lenses of equal focal length and aperture, there are differences. 甚至即使是同样焦长度和光圈的镜头仍有不同。
- Courses can be of variable length and time. 各课程之开办期间及时间会有所不同。
- (physiology) the automatic adjustment in focal length of the lens of the eye （生理学）用眼的透镜来自动调节焦距
- A programmed time delay of variable duration. 暂停，展宽一种由程序设置的可变持续时间的时间延迟
- (physiology) the automatic adjustment in focal length of the lens of the eye. （生理学）用眼的透镜来自动调节焦距。
- variable focal length lens 变焦距透镜
- The lens of the eye accommodate to distance. 眼球晶状体能根据距离进行调节。
- He focuses the lens of a microscope. 他调整显微镜的透镜以定焦点。
- The focal length of a given lens is different for different colors. 一个特定的透镜的焦距因颜色的不同而不同。
- This photogragh is shot by lens with a long focal length. 这张照片是用长镜头拍摄的。
