beam lead transistor

例句：

1. 1. The beam of light from the sun illuminates the room.
   阳光从窗户射入，照亮了房间。
2. 2. The beam of the spotlight was shining directly at her.
   聚光灯的光束直接照在她的身上。
3. 3. The beam of a searchlight can be used to guide a boat through fog.
   探照灯发出的光束可以用来引导船只穿越雾气。