alarm clock 是一个固定词组,就是闹钟的意思.见下面注解2.alarm[ә`lɑrm;ә`lɑ:m]n.1.警报; 警报器[C]The doorkeeper gave the alarm as soon as he saw the smoke.守门人一看见冒烟就发出警报.2.闹钟[C...