electron bundle

例句：

1. 1. The electron beam was focused to a small spot on the screen.
   电子束被聚焦在屏幕上的一个小点上。
2. 2.The electron beam is used in particle accelerators to detect subatomic particles.
   电子束用于粒子加速器中探测亚原子粒子。
3. 3.The electron beam was used to create an X-ray image of the patient's chest.
   电子束被用来为病人胸部的X射线图像。