您要查找的是不是：
- beam focusing voltage 电子束聚焦电压
- The result of the calculation shows that the gun has the function of dynamic focus,and dynamic focus voltage is depress.The performance of the gun is well improved. 结果表明屏边角的光点形貌有了很大改善，动态聚焦电压得到了很大降低，表明了该改进枪具有一定的动态聚焦作用，枪的性能有了很大的提高。
- There is dependence between e/m error and accelerating voltage or focus voltage in the measurement of e/m by magnetic focusing method. 在利用磁聚焦法测量电子比荷的实验中;测量误差与示波管的加速电压和聚焦电压存在较大的相关性.
- Key words: Electron optics,Wide electron beam focusing,Curvilinear coordinate system,Concentric spherical system,Numerical computation,Aberration. 关键词:电子光学，宽电子束聚焦，曲线坐标系，同心球系统，数值计算，像差
- She performed on the balance beam with much grace. 她在平衡木上表演得非常优美。
- He was too shortsighted to focus on the object. 他由于近视过深而无法把视力焦点对准在该物体上。
- The beam of the searchlight pierced the darkness. 探照灯的光柱射入黑暗中。
- He always wants to be the focus of attention. 他总想成为注意力的焦点。
- His answer was right on the beam. 他的答案完全正确。
- You should focus your attention on your work. 你应该把注意力放到工作上。
- The focus on my camera isn't working properly. 我的照相机上的调焦装置有毛病。
- He struck the beam with his head. 他的头撞到梁上了。
- In tonight's programme our focus is on Germany. 在今天晚上的节目中我们重点介绍德国。
- The beam has a thickness of 3 inches. 这根梁厚3英寸。
- Never heard of her. You're off the beam. 我从来没有听说过这个人，你搞错了吧。
- For me, your explanation is a bit out of focus. 对我来说，你的解释还不太清楚。
- A defect of focus, such as blurring in an image. 像差焦点不准确而造成的物像模糊
- She always wants to be the focus of attention. 她老想成为人们注意的中心。
- Her beauty makes her the focus of attention. 她长得漂亮，很惹人注目。
- Mind you don't knock your head (on this low beam). 小心，别(让这根低梁)撞著头。
