vain

adj.

徒劳的；自负的；无结果的；无用的

in vain徒然；无效

vain glory虚荣

1. She is vain and foolish, and yet people like her.
   她自负而愚蠢，然而人们喜欢她。
2. She is vain of her voice.
   她自以为她的声音了不起。
3. They endeavoured to make her happy but in vain.
   他们尽量使她快乐，却徒劳无功。
4. All his father's exhortations were in vain.
   他父亲的一切劝告都无效。
5. We tried in vain to make him change his mind.
   我们想使他改变主意，结果是白费心机。
6. The world had made him extravagant and vain.
   世俗使他变得放荡不羁，虚荣自负。
7. She is so vain that she can't pass a mirror without looking into it.
   她好爱虚荣,每经过一面镜子都要照一下。

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Vain, P. , Afolabi, A.S. , Worland, B. & Snape, J.W. Transgene behaviour in populations of rice plants transformed using a new dual ...
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