vain
形容词比较级
vainer
形容词最高级
vainest
1
自负的, 虚荣的
taking great pride in one's abilities, appearance, etc.
- Despite his lack of talent, he was vain enough to believe he was the best singer in the group.
尽管缺乏天赋，他还是自负地认为自己是团队中最好的歌手。
- The actress's vain behavior made it difficult for her co-stars to work with her.
这位女演员虚荣的行为让她的合作演员很难与她共事。
- He was so vain about his physical appearance that he refused to leave the house without perfect grooming.
他对自己的外表如此自负，以至于拒绝在没有完美打扮的情况下离开家。
- She was so vain about her intelligence that she dismissed others' opinions as inferior to her own.
她对自己的聪明才智如此自负，以至于认为别人的意见都不如自己。
- She was so vain that she spent hours in front of the mirror, obsessing over her appearance.
她如此虚荣，以至于在镜子前花费数小时，痴迷于自己的外表。
2
徒劳的, 无用的
not producing any successful outcome
- She made a vain effort to change his mind, but he was already determined.
她做出了徒劳的努力来改变他的想法，但他已经下定决心了。
- The vain struggle to save the old building was ultimately unsuccessful.
为拯救旧建筑而进行的徒劳斗争最终没有成功。
- Their vain bid to win the contract ended in disappointment.
他们为赢得合同所做的徒劳努力以失望告终。
- The vain hope that the weather would clear up was quickly dashed by the storm.
天气会好转的徒劳希望很快就被风暴破灭了。
- She made a vain effort to change his mind, but he remained stubborn.
她做出了徒劳的努力来改变他的想法，但他仍然固执。