alarm 和 clock 都有闹钟的意思,为什么还是用alarm clock 来表达闹钟呢,如Did the alar

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alarm 和 clock 都有闹钟的意思,为什么还是用alarm clock 来表达闹钟呢,如Did the alarm clock go off

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] (=alarm clock)
3.惊慌,恐惧,担忧[U]
"What's up?" he asked in alarm.
"出什么事了?"他惊恐地问道.

alarm 和 clock 都有闹钟的意思,为什么还是用alarm clock 来表达闹钟呢,如Did the alar Alarm Clock Rebel:完美闹钟如何设置 Alarm clock（闹钟）怎样读写一片英语作文：我的闹钟 My Alarm Clock i am an alarm clock这句话有其他什么意思?除了我是个闹钟为什么英语中 “把闹钟定在8点”是I set the alarm clock for 8:00 闹钟响了吗Did the alarm clock go off怎么我听发音是 do be 老鹰ing clock go alarm o'clock还是alarm clock? A: Did you set the alarm clock? A:Did you set the alarm clock? alarm clock用英语翻译 alarm clock