alarm for a trailed switch

例句：

1. 1. The alarm clock woke me up at6:00.
   闹钟在早上六点把我叫醒了。
2. 2. Thefire department was called tothe scene of the fire.
   消防队被叫到火灾现场。
3. 3. Sheset off a fire alarm in the kitchen.
   她在厨房里触发了火警。