smoke alarm

例句：

1. 1. The smoke alarm went off when the fire started.
   火灾发生时，烟雾报警器响了。
2. 2.The smoke alarm woke us up just as the fire was getting out of control.
   当火势失控时，烟雾报警器把我们叫醒了。
3. 3.It's important to have a working smoke alarm in your home.
   在你家安装一个工作正常的烟雾报警器很重要。