alarm clock

名词 alarm clock:

1. a clock that wakes sleeper at preset time
   同义词：alarm

1. I was so sleepy, I thought it was my alarm clock.
   那个时候我很困，所以以为是闹钟在响。
2. I set the alarm clock.
   我设定闹钟的时间。
3. He needs an alarm clock.
   他需要一个闹钟。
4. I didn't wake up until I heard the alarm clock.
   直到听到闹钟的铃声我才醒来。