He did that to gratify his girlfriend's vanity.是什么意思？

He did that to gratify his girlfriend's vanity.

他做那事是要满足他女友的虚荣心.

he

pron. 他，它，一个人；n. 雄性动物；

例句
Logic had prevailed and he had abandoned the idea.
最终理智占了上风，他打消了那个念头。

did

v. 做( do的过去式)，干，学习，研究；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

that

det. 那个，那；pron. 那个，那；conj. 多么，如此…以至，用于某些动词、形容词和名词后，引出各种从句；adv. 不那么，那样；

例句
...expensive make-up that we saw being advertised by a beautiful model...
我们所见的由一位漂亮模特代言的昂贵化妆品

to

prep. 向，朝着，到，关于，属于；adv. 朝一个方向的，到某种状态，关闭；

例句
I suggest you leave it to an expert...
我建议你把它留给专家来解决。

gratify

vt. 使高兴，使满意；

例句
He did that to gratify his girlfriend's vanity.
他做那事是要满足他女友的虚荣心.

his

pron. (he的所有格)他的，(he的物主代词)他的东西；det. 属于他的，用于名词前，自己的，指某人的，上帝的；

例句
He claimed that his parents had abandoned him...
他声称父母遗弃了他。

vanity

n. 虚荣，浮华，自负，空虚，无聊的事物，无价值的东西；

例句
Frank Deford is a contributing editor for Vanity Fair magazine.
弗兰克·德福特是杂志《名利场》的特约编辑。