例句
I searched vainly for my keys under the sofa.
我在沙发下面找钥匙，却一无所获。
Residents have vainly requested better bus services for years, leaving many dependent on private cars.
居民多年来要求改善公交服务，却始终未果，致使许多人仍然依赖私家车。
常用搭配
- try vainly to do something｜徒劳地试图做某事
- search vainly for｜徒劳地寻找
- struggle vainly｜徒劳地挣扎
词形与相关词
vain (adj.) · vanity (n.)
用法提示
vainly侧重努力无果，常可换成in vain。