"break a sweat" in Chinese (Simplified)
出汗
Definition
因为体力活动而出汗，也可以指付出很大努力。有时否定使用，表示事情很容易。
Usage Notes (Chinese (Simplified))
常与否定连用，如“didn't break a sweat”，表示轻而易举。可以指字面上的出汗，也可以是比喻含义（毫不费力）。属于非正式口语表达。
Examples
It was so hot that I broke a sweat just walking to work.
天气很热，走路去上班都**出汗**了。
He didn't break a sweat during the exam; it was easy for him.
他考试时根本没**出汗**，对他来说很简单。
She ran up the stairs and didn't even break a sweat.
她跑上楼梯，甚至没有**出汗**。
Finishing that puzzle didn’t even make me break a sweat.
做完那个拼图，我都没**出汗**。
She lifted the heavy box without breaking a sweat.
她搬起那个沉箱子，连**出汗**都没有。
Some people can run a mile and not break a sweat, but I can't!
有些人能跑一英里都不**出汗**，但我做不到！