well-focussed beam

例句：

1. 1. The laser is a well-focussed beam of light that can be used for precise cutting.
   激光是一种聚焦光束，可以用来进行精确切割。
2. 2.The engineer designed the well-focussed beam to illuminate the dark room.
   工程师设计了一束聚焦光束来照亮黑暗的房间。
3. 3.The well-focussed beam was used to scan the object and detect any defects.
   这束聚焦光束被用来扫描物体并检测任何缺陷。