n. fear resulting from the awareness of danger
n. a device that signals the occurrence of some undesirable event
n. an automatic signal (usually a sound) warning of danger
v. warn or arouse to a sense of danger or call to a state of preparedness
n. 惊恐, 警报, 警钟
vt. 使惊恐, 警告
[计] 报警信号
1. I set the alarm for 7 AM so I won't be late for work.
我把闹钟设置在早上7点，以免上班迟到。
2. The fire alarm went off, and everyone had to evacuate the building.
火警警报响了，大家都必须疏散大楼。
3. She woke up to the sound of her alarm clock ringing.
她被闹钟的铃声叫醒。