mercury bulb

例句：

1. 1. The mercury bulb wasa source of light for the room.
   这个水银灯泡为房间提供了光源。
2. 2. Themercury bulb was used in earlytelescopes.
   水银灯泡在早期的望远镜中被使用。
3. 3. The mercurybulb is dangerous to handle and should behandled with care.
   水银灯泡危险，应小心处理。