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1·Can I control the focal length?

我能控制焦距吗？

2·Set the focal length on your lens.

给你的镜头设置焦距。

3·Empty eyes, can not find the focal length.

空洞的眼眸，找不到焦距所在。

4·The iPhone camera has a fixed focal length.

iPhone的摄像头有焦距固定。

5·That cone Angle is directly controlled by the focal length.

圆锥角度直接受到焦距的控制。

6·Camera lenses have two general attributes: f-stop and focal length.

照相机镜头有两项一般属性：f制光圈和焦距。

7·For me, one of the initial questions is how to set the focal length.

对于我来说，一个首要问题就是怎样设置焦距。

8·Two lenses of focal length 10 cm have a combined focal length of 5 cm.

两个焦距都是10厘米的透镜形成的组合透镜焦距为5厘米。

9·This is the ratio of the focal length of the telescope to its aperture.

这是指望远镜的焦距与其孔径的比值。

10·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。