1. 徒劳的;无效的;不成功的
A vain attempt or action is one that fails to achieve what was intended.
e.g. The drafting committee worked through the night in a vain attempt to finish on schedule...
起草委员会为按计划完成草案已通宵加班,但结果仍是徒劳。
e.g. I was singing in a vain effort to cheer him up.
我唱歌试图让他高兴起来,结果是白费力气。
形容词徒劳的; 自负的; 无结果的; 无用的
形容词loftyself-centeredegotisticalconceitedineffectualfutileproudboastfulegocentrichaughtyunsuccessfulfruitless
形容词effectualeffective
vain
1. in vain : 徒然;