alarm for burnout of filaments

例句：

1. 3.
   车辆、飞机等
2. 1. The alarm clock woke me up at 6:00 a.m.
   闹钟在早上六点把我叫醒了。
3. 2. The police were alerted to the fire by the smoke detectors.
   警察通过烟雾探测器得知了火灾。
4. 3. He was so excited that he couldn't keep his eyes open, so he had to close them for a while.
   他太兴奋了，眼睛睁不开，所以不得不闭上眼睛一会儿。