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- Dynamic-focus electron gun(DFG)can be used to improve the edge displayproperty of CRT. In this paper,a type of DFG is calculated and analyzed. Static focus characteristic,dynamic focus characteristic,and the quadrupole field are discussed. 采用动态聚焦电子枪能够提高CRT的边缘分辨率，本文对一种动态聚焦电子枪进行了计算与分析，并讨论了其静态聚焦特性、动态聚焦特性及四极场的作用。
- Study on focusing characteristic of acceleration tube in high current implanter[J]. 引用该论文 刘晓芝;孙利平;王应德;陈林.
- Focusing Characteristics and Beam Quality of Phase Aberrated Beam[J]. 引用该论文 钱列加;张筑虹;朱宝强;詹庭宇;范滇元.
- This novel fiber structure can increase the coupling efficiency of SMF effectively by using the wavefront-transfer characteristic of hyperbolic-shaped lens and the focusing characteristic of GIF. 双曲线透镜能将雷射波前转换为平面波，且利用GIF的聚焦特性，因此能有效提高SMF耦光效率。
- 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。
- He always wants to be the focus of attention. 他总想成为注意力的焦点。
- 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。
- Sympathy is the feeling characteristic of mankind. 同情心是人类特有的感情。
- 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。
- 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
- He spoke with characteristic enthusiasm. 他以特有的热情说话。
- This paper studies the focusing characteristics of Gauss beam passing through zone plate based on the characteristics of zone plate. 从波带片的特性出发研究高斯光束通过波带片的聚焦特性。
- She always wants to be the focus of attention. 她老想成为人们注意的中心。
- Her predominant characteristic is honesty. 她最为突出的特点是诚实。
- Her beauty makes her the focus of attention. 她长得漂亮，很惹人注目。
- Characteristic of or befitting a warrior. 勇敢的，好战的具有战士、勇士特征的或适宜于勇士的
- I got her in focus before I took the photo. 我在拍摄前先用镜头把她对清楚。
- He took out the binoculars and adjusted the focus. 他取出双筒望远镜并调整了焦距。
