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- magnetically focused electron beam 磁性聚焦电子束
- He focused his binoculars on the bird. 他把双筒远镜的焦点对准在那只鸟上。
- He focused his mind on his new plan. 他集中心思在新计划上。
- His eyes focused slowly in the dark room. 他在那间黑屋子里眼睛慢慢地看清了东西。
- The camera is focused at infinity. 照相机的聚焦被调节在无限远这一档上。
- electromagnetic focus electron gun 电磁聚焦式电子枪
- The transmitter was pulsed by an electron tube. 电子管使发射器产生脉冲波。
- He focused the sun's ray on a piece of paper with a burning-glass. 他用一面凸透镜把阳光在纸上聚成焦点。
- The beams of light moved across the sky and focused on the plane. 光束在空中移动,集中对准飞机。
- An electron tube having a cathode and an anode. 电子二极管有一个阳极和一个阴极的电子管
- She had a habit of shrinking up whenever attention was focused on her. 她有个习惯，每当人们的注意力集中到她身上时，她便会羞羞答答地畏缩不前。
- The scientist focused the telescope on the moon. 科学家把望远镜的焦点对准月亮。
- The number of electron pairs an atom can share with other atoms. 共用电子对数，共价一个原子与其他原子共用的电子的对数
- An electron with a negative charge, as contrasted with a positron. 电子带有负电荷，与正电荷相反的电子
- They focused their attention on the main problems. 他们把注意力集中在主要问题上。
- He had a tendency to shrink up whenever attention was focused on him. 当别人注意他时，他就会退缩一旁。
- A portable TV camera focused on him. 一台便携式电视摄影机的镜头对着他。
- They serve as focused references on those subjects. 它们对有关专题提供一些有针对性的参考意见。
- To calm himself,he too focused on the view. 可现在，为了使自己平静下来，他也专心一致地看着眼前的景色。
- Attempts to split an electron always fail. 企图分裂电子的尝试总是失败的。
