focal中文什么意思

adj.
1.【物理学】焦点的，(集中)在点上的，有焦点的。
2.【医学】病灶的，病灶性的。adv.
-ly

• focal distance, focal length:    焦距
• focal point, focal spot:    焦点
• a focal point:    焦点

例句与用法

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1. A typical lens has a focal length(f)of 625 mm .
   常见镜头的焦距（f）为625毫米。
2. The focal depth was about 6 mi .
   震源深度约6哩。
3. As a result, the focal lengths in these planes will be different .
   结果，这两个平面内的焦距将不同。
4. 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。
5. The baker super-schmidt camera can operate with extremely low focal ratios .
   Baker超施密特照相机则能以非常低的焦比工作。

英文释义

a

1. of or relating to a focus; "focal length"

形容词

1. having or localized centrally at a focus; "focal point"; "focal infection"