alarm go off

• 警报器响

alarm go off的用法和样例：

例句

1. The guard loosed the dogs when the burglar alarm went off.
   防盗警报器一响，警卫就放出了警犬。
2. The thieves ran away when the burglar alarm went off.
   防盗警报器一响，盗贼立刻逃走了。