“around the clock”的意思是“全天候，昼夜不断的”。around the clock指连续一整天。想象一下围着钟表转，一点都不停歇，岂不是夜以继日，不眠不休嘛。
around the clock使用例句
The restaurant is open around the clock.
这家餐馆24小时营业。
A: Did you notice Kate? She looks not very well these days.
你注意到凯特了吗？她最近状态看起来不是很好啊。
B: Oh yeah. She's been working around the clock for weeks.
对啊。她已经连续几周不眠不休地工作了
We worked round the clock to finish the job.
我们为了完成工作夜以继日地工作。
We are studying around the clock when we are preparing for the final exam.
我们在准备期末考试的时候，夜以继日的学习。
Hey. You've really been working around the clock lately. What's going on?
你最近真的在没日没夜的工作，怎么回事啊？
下面我们再看几个和这个英语口语表达有关的例句：
Doctors and nurses worked around the clock to help the people injured in the train crash.
医生和护士昼夜不停地工作，拯救在火车车祸中受伤的人们。
This station broadcasts news around the clock.
车站日夜不停地播放新闻。
Some stores stay open around the clock, while others do business for only a few hours a day.
有些商店昼夜营业，有些每天只开门营业几个小时。