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. There are two basic types of shutters used in photographic cameras-between-the-lens and focal plane .
   摄影照相机内使用的快门有两种基本类型：透镜间快门和集平面快门。
2. Spot diameters of just a few thousands of an inch can readily be attained with convenient short focal length lenses .
   用普通的短焦距透镜不难得到直径只有几十微米的光点。
3. Hemadsorbing viruses can be titrated by counting the number of focal areas to which rbcs are absorbed .
   具有血细胞吸附力的病毒滴定，可以通过计算吸附红细胞的集中区数来完成。
4. Only the revolution actually taking place, could provide a focal point for their positive support and confidence in the people's victory .
   唯有实际发生的革命才能为他们的积极支持提供一个集中的焦点和对人民胜利的信念。
5. This is the focal and difficult point of the paper
   这部分是文章的重点和难点。

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"