adv.徒劳地vainly Adverb to no avail;"he looked for her in vain""the city fathers tried vainly to find a solution" vainly例句 用作副词(adv.)He had tried vainly and lost his heart at last.他徒劳地尝试，终于失去了信心。 We...

发布时间：2025-11-01 浏览量：1