「昼夜不断」英文怎么说？

around-the-clock 

连续24小时的、日夜不停的、昼夜不断的

Doctors and nurses worked around-the-clock to help those injured in the train crash. 

医生和护士们日以继夜地工作，去帮助那些在火车事故中受伤的人。

She needed around-the-clock nursing. 

她需要24小时的看护服务。

The intro

(Listening Comprehension)

Hey what's up ? It's Mr.Wong here. The idiom for today is..."around-the-clock". The definition of "around-the-clock" is all day and all night, an entire 24-hour day. So when you're working around-the-clock, you're busy all day and all night long. The phrase "around-the-clock" is commonly used when someone is hard at work, or is doing something difficult. You might say that a new baby seems to cry around-the- clock, or that the emergency room in your city is busy around-the-clock. It's easy to understand how this saying arose when you imagine the hour hand on a clock moving all the way around its face twice — in other words, marking a whole day. Check it out !

没听懂？请自己查字典！

（这才是真正的学习过程）