vain是什么意思音标:英 [veɪn]美 [ven]

a. 无价值的, 徒然的, 空虚的, 自负的, 愚蠢的

s characteristic of false pride; having an exaggerated sense of self-importance
s unproductive of success

vain的用法和例句：

1.I took you with me because I was vain.

我带上你旅行是因为我虚荣

2.He's shallow and vain and not what I imagined him to be.

他又肤浅 又自负 跟我想象得一点也不一样

3.So that your child did not die in vain.

这样你的孩子才不会白白死去

4.If they did, all those people would have died in vain.

如果发现了 那些人就白死了

5.It is yours to decide, my girl, what is in vain and what is not.

决定权在你 孩子 这些牺牲会不会白费

6.You know how vain he is about his women.

你知道他向来在意他女人的形象

7.Unfortunately, those sacrifices have been in vain.

不幸的是 那些牺牲都白费了

8.We didn't raise her to be so vain, to be so deceitful.

我们并没有教得她那么虚荣 那么虚伪

9.It's because you're too vain to wear your glasses.

那是因为你虚荣得不愿意戴眼镜

10.I swore his death would not be in vain.

我发过誓不会让他白白牺牲