防盗报警系统

例句：

1. 1. The alarm clock woke me up at 5:30.
   闹钟在早上5:30叫醒了我。
2. 2. She set the alarm for 7:00 to wake up early.
   她设定了闹钟，要在7点起床。
3. 3. The fire department arrived in time to put out the alarm fire.
   消防队及时赶到扑灭了火灾。