波束导引

例句：

1. 1. The beam of light illuminated the dark room.
   一束光照亮了黑暗的房间。
2. 2. The beam of sunlight fell on the grass.
   阳光的光束落在草地上。
3. 3. The beam of the spotlight was shining directly at her.
   聚光灯的光束直接照在她的身上。