cut-off beam

例句：

1. 1.The engineer used a laser to cut off the beam of light.
   工程师使用激光来切断光束。
2. 2.The scientist discovered a new way to cut off beams of light.
   科学家发现了一种新的方法来切断光束。
3. 3. The car was damaged by a sudden cut-off beam from an overhead power line.
   汽车被一根高压线上突然切断的光束损坏了。