警報器的用法和樣例：
例句
-
這些煙把警報器觸響了。
The smoke triggered off the alarm. -
防盜警報器一響，警衛就放出了警犬。
The guard loosed the dogs when the burglar alarm went off. -
防盜警報器一響，盜賊立刻逃走了。
The thieves ran away when the burglar alarm went off. -
我們都聽到了空襲警報器的聲音。
We all heard the air-raid siren.
