调节...的焦距

The field glass es adjust with a screw.

双筒望远镜是用一个旋钮调节焦距的。

The field glasses adjust with a screw .

双筒望远镜是用一个旋钮调节焦距的。

The magnifying glass focal distance may around adjust up and down, suits each kind of age the crowd use.

放大镜焦距可上下前后调节，适合各种年龄的人群使用。

The photographs move from a position of public distance and through focal length adjustments allow for private scenes and stories to brought to light, teeming with ambiguity and manifold questions.

作品中的私密场景掌握在公共距离的许可下，却又因镜头焦距的调节而情节暧昧、滋生疑问重重。

Experimental results and values in theory were accordant well. Experimental results showed that the radius of focal spot would increase with the longer focal length, and focal depth would decrease with higher order of FZPs.

实验还发现，聚焦的焦斑半径会随着焦距的长度而增大，而聚焦深度则随着分形波带片的阶次的升高而减小，同时还对比了分形波带片和常规波带片的焦距调节方式和精度，理论研究表明分形波带片的调节焦距的方式具有更高的调节精度。

Stop Down: To decrease the diameter of the light-admitting orifice of a lens by adjustment of an iris diaphragm.

缩小光圈：镜头的焦距和光圈的有效直径之间的关系。一可调节的彩虹光阑，减少透镜光孔的直径。

The lens axicon is based on the use of the spherical aberration of the mirror surfaces,which is inexpensive and easy to manufacture into a element with large apertures as compared with diffractive axicons,refractive cone axicons,and earlier lens axicons with aspheric surfaces;the opaque disk can offer the Bessel beams with long non-diffracting distances,and the diameter of the central peak is adjusted by choosing the focal length of the collimating lens;the tunable fluidic conical lens is a new device for generating Bessel beams,which can obtain the Bessel beams with different parameters by varying the refractive indexes of the solution which is filled in the device.

双透镜轴棱锥法主要基于透镜球面像差的运用，与衍射轴棱锥、折射轴棱锥和早期的非球面轴棱锥相比，具有加工简单、便宜，易于制作大尺寸的特点；不透明障碍物法得到的贝塞尔光束具有很长的无衍射距离，其直径可通过选择不同焦距的准直透镜来得到调节；可调流体轴棱锥是一种产生贝塞尔光束的新型器件，它可以很容易地通过改变注入器件的液体的折射率来得到不同参量的贝塞尔光束。

It allows for versatile adjustment by panning, tilting and rotating the varifocal lens to any camera angle desired.

它还可以对镜头进行水平、垂直及焦距的调节，以满足用户对摄像机视角调节的需要。

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。