adv.徒劳地，无益地

He searched fruitlessly for his misplaced keys, wasting hours of his time.
他徒劳地寻找丢失的钥匙，浪费了几个小时的时间。
Her efforts to solve the problem were fruitlessly repetitive, leading to frustration.
她解决问题的努力毫无成效，令人沮丧。
She tried calling him numerous times, but her calls went unanswered, as if she was searching for a needle in a haystack fruitlessly.
她多次打电话给他，但始终无人接听，就像在针海中徒劳地寻找一样。
The gardener's attempts to revive the withered plants were fruitlessly futile.
园丁试图让枯萎的植物恢复生机的努力是徒劳无功的。
After months of job hunting, she remained unemployed, her search for work fruitlessly endless.
找了好几个月的工作，她仍然失业，找工作似乎永无止境。
The detective combed through the crime scene, but found no clues, his investigation proving fruitlessly elusive.
侦探仔细搜查犯罪现场，但没有发现任何线索，他的调查显得徒劳而难以捉摸。
His efforts to persuade her changed nothing; she remained stubbornly unyielding, his arguments fruitlessly wasted.
他试图说服她，但一切努力都无济于事，她固执地不愿妥协。
The team spent countless hours practicing, but their performance on the big stage was fruitlessly disappointing.
团队付出了无数时间练习，但他们在大舞台上却表现得让人失望至极。
The scientist tried every experiment, but each attempt ended in failure, his research fruitlessly exhausting.
科学家尝试了每一个实验，但每次都是以失败告终，他的研究徒劳且令人疲惫。
In his quest for knowledge, he read countless books, but the answers he sought remained elusive, his search fruitlessly extensive.
在追求知识的过程中，他阅读了无数书籍，但寻求的答案依然遥不可及，他的探索范围广泛但徒劳无获。