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1·Who set off the fire alarm?

谁拉响了火警报警器？《牛津词典》

2·The smoke sets off the fire alarm.

烟雾触发了火警报警器。《柯林斯英汉双解大词典》

3·The lecture was curtailed by the fire alarm going off.

那次讲座被突然鸣响的火警中断了。《牛津词典》

4·Then the fire alarm went off. I just grabbed my clothes and ran out.

之后火警响了，我只抓起衣服就跑了出去。《柯林斯英汉双解大词典》

5·Suddenly the fire alarm went off. We all rushed out the door.

突然，火警警报响了。我们都冲出门去。

6·To their surprise, they found that it climbed over to the fire alarm on the back wall and set it off!

令他们惊讶的是，他们发现它爬到了后墙的火警警报器上，拉响了警报！

7·Most are also equipped with automatic fire alarm systems.

大多数还配备了火灾自动报警系统。

8·The manual fire alarm systems includes fire alarm pull stations and pipes.

手动火灾报警系统包括了火警拉栓和管道。

9·The floors of all campus buildings are equipped with manual fire alarm system.

所有校园建筑的楼层均装有手动火灾报警系统。

10·If the fire alarm is counted, all residents are requested to assemble in the courtyard.

如果算上了火警，请所有居民在院子里集合。