vainly

adv. /ˈveɪn.li/ B2

徒劳地；枉然地

Without success or producing no intended result.

仙境例句

The Pigeon vainly looked for a place where no serpent could find her eggs.

鸽子白费力气地找啊找，想找一个蛇找不到她的蛋的地方。