焦距

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。

At present researchers work at the analogous optical system, which makes possible to change focal length.

目前，研究人员的工作，类似的光学系统，这使得可能改变焦距。

We can therefore solve the problem by using different focal length in the process of tracking measurement.

如果能在跟踪测量过程中改用不同的焦距就能解决此问题。

It's great to have a super-zoom so I can use every focal length, I really need that!

它有一个超级大变焦这样我就可以利用各种焦距，我真的需要那个！

The aim must be to achieve the requirements of lens focal length.

其目的是必须达到凸透镜焦距的要求。

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。

This unusually short focal length has some advantages and some disadvantages.

这种不寻常的短焦距设计是有利有弊的。

C:Can I control the focal length?

我能控制焦距吗？

An optical lens with a power of + 1 dpt has a focal length of 1 m.

例如焦距是10厘米的镜片（0.1米）其屈光度就是10。

A unit of measurement for focal length is "mm" and it varies based on an angle of view.

镜头的焦距长是以mm为量测单位是和视角有直接关系。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。