vainvein英式朗读美式朗读基本解释a. 无价值的, 徒然的, 空虚的, 自负的, 愚蠢的英文释义s characteristic of false pride; having an exaggerated sense of self-importance s unproductive of success词形变化最高级vainest比较级vainer上一个单词:vails下一个单词:vainer