Vainer
a. 自负的( vain的比较级 ); 爱慕虚荣的; 徒劳的; 无用的
🗣️ 情景例句
Learning any language takes a lot of effort.
学习任何语言都需要花费很多努力。
Wanna bet?
要不要来赌？
Sam was sure that the wallet must have been found by one of the villagers, but it was not returned to him.
萨姆确信那钱包一定是被某个村民捡到了，可是却不见有人来送还给他。