wake-up call

1. N-COUNT A wake-up call is a telephone call that you can arrange through an operator or at a hotel to make sure that you wake up at a particular time. (縂機、賓館等提供的) 叫醒電話

I book a wake-up call for 4:45 a.m. 我預訂了淩晨4點45分的叫醒電話。

2. N-COUNT If you describe something bad that happens as a wake-up call, you mean that it acts as a warning that action needs to be taken to prevent something even worse from happening. 警鍾

He urged her to treat the arrest as a wake-up call. 他力勸她把這次拘捕儅作一次警鍾。