音标与读法

这里为大家介绍下focal 是什么意思，希望能帮助到各位朋友。

中英文翻译

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

of or relating to a focus; "focal length"

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

例句与用法

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。

6.The focal length of the camera lens plays an important role in photo criteria .

摄影机镜头的焦距在摄影规范中起着重要的作用。

7.The field of view can be limited by inserting a stop in the focal plane of microscope .

可以在显微镜的焦平面上加装一光阑，从而限制视区。

8.The unsteadiness of air becomes prohibitive only if instruments with large focal length are used .

只有在使用长焦距的仪器时，才不允许空气的不稳定。

9.The mirror of an astronomical telescope forms at its focal point an image of a star on the axis of the mirror .

天文望远镜把在镜轴上的星体成象在焦点上。

10.The focal length of the conelensing lens should be such that the image of the source just fills the projecting lens .

聚光透镜的焦距应使光源的像正好照满放映透镜。

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