"vain" in Chinese (Simplified)
虚荣的徒劳的
Definition
如果一个人很虚荣，意思是他过分在意自己的外表或别人的赞美。它也可以表示某事是徒劳的，没有产生任何结果。
Usage Notes (Chinese (Simplified))
用于人时，'vain' 通常带有负面含义，表示一个人过分在意外表或别人怎么看自己。在短语 'in vain' 中，它表示“白费地、徒劳地”，这种用法在书面语或较正式的语境中更常见。
Examples
We tried to stop the leak, but it was vain.
我们试着堵住漏水，但都是**徒劳的**。
She made a vain attempt to call him before the flight.
她在起飞前**徒劳地**试着给他打电话。
He's so vain that he posted ten photos of the same haircut.
他太**虚荣了**，同一个发型发了十张照片。
He is very vain and looks in the mirror all day.
他很**虚荣**，整天照镜子。
All our complaints were in vain; they never fixed the problem.
我们所有的投诉都**白费了**；他们一直没有解决这个问题。
I knew arguing with him would be vain, so I just walked away.
我知道跟他争论会是**徒劳的**，所以我就走开了。