beam path

例句：

1. 1.The beam path was blocked by the dust cloud.
   光束路径被灰尘云阻挡了。
2. 2.The engineer used a laser beam path to measure the distance.
   工程师使用激光光束路径来测量距离。
3. 3.The beam path is crucial for the operation of the machine.
   光束路径对于机器的运行至关重要。