vain

形容词 vain:

1. characteristic of false pride; having an exaggerated sense of self-importance
   同义词：conceited, egotistic, egotistical, self-conceited, swollen, swollen-headed
2. unproductive of success
   同义词：bootless, fruitless, futile, sleeveless

1. They endeavoured to make her happy but in vain.
   他们尽量使她快乐，却徒劳无功。
2. She is vain of her voice.
   她自以为她的声音了不起。
3. He tried in vain to catch the butterfly on the flower.
   他白费力气想抓住停在花上的蝴蝶。
4. All his father's exhortations were in vain.
   他父亲的一切劝告都无效。
5. She is vain and foolish, and yet people like her.
   她自负而愚蠢，然而人们喜欢她。
6. A vain person; a dandy.
   虚荣的人; 爱炫耀的人
7. All our work was in vain.
   我们的工作全都白干了。
8. 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。