vain
翻译
虚荣的, 自负的, 徒劳的, 无效的
例句
He is very vain about his appearance.
他非常注重自己的外表。
It was a vain attempt to change her mind.
想改变她的想法是徒劳的。
All our efforts were in vain.
我们所有的努力都白费了。
语法模式
to be vain about ((sth.)) 对（某事）感到虚荣 He is vain about his looks.
in vain 徒劳地 All their work was in vain.
近义词
同义词: (自负的) conceited, narcissistic; (徒劳的) futile, useless; 反义词: (自负的) modest, humble
词源
源自拉丁语“vanus”，意为“空的”或“虚无的”。
记忆技巧
想象一个“虚荣的(vain)”人“徒劳地(in vain)”照镜子。这两个意思都与“空虚”有关。