和平海棠
vain[英] [veɪn][美] [veɪn]adj.自负的, 自视过高的, 爱虚荣的; 无结果的, 无效的[例句]their flattery made him vain.他们的吹捧使他自命不凡。
爱吃甜的小马
vain / Ñ veIn; NAmE Ñ / adjective 1that does not produce the result you want SYN useless:She closed her eyes tightly in a vain attempt to hold back the tears. Ç I knocked loudly in the vain hope that someone might answer.2(disapproving) too proud of your own appearance, abilities or achievements SYN conceited:She’s too vain to wear glasses.—see also vanity(这是牛津最新版上的解释,希望你能看得懂!)