vain adi 1) too pleased with one's abilities or looks虚荣 的,自负的【~of/ about】: Too much praise can make a person vain She was vain of/about her appearance 2)无用的;徒劳的: All our work was in vain 我们所有的工作都白费了 Ex他对自己的发言很得意 He is vain of his speechvain adj. 1) too pleased with one's abilities or looks 虚荣 的，自负的 【~of/ about】: Too much praise can make a person vain. She was vain of/about her appearance. 2) 无用的；徒劳的: All our work was in vain. 我们所有的工作都白费了。 Ex.他对自己的发言很得意。 He is vain of his speech