boiler alarm

例句：

1. 1. The boileralarm went off when the temperature dropped belowfreezing.
   当温度降到冰点以下时，锅炉警报器响起了。
2. 2. The engineerchecked the boiler alarm before starting the newproject.
   工程师在开始新项目之前检查了锅炉警报器。
3. 3. The boiler alarm wokeus up in the middle of the night.
   锅炉警报器半夜把我们叫醒。