After hours of searching, their efforts remained fruitless.
经过数小时的搜寻，他们的努力仍然无果。
The negotiations were long but ultimately fruitless for both parties.
谈判持续了很久，但最终对双方来说都是徒劳的。
His attempts to fix the car were completely fruitless.
他修理汽车的尝试完全无效。
Despite their hard work, the project ended in fruitless results.
尽管他们努力工作，项目最终还是没有结果。
The rescue mission turned out to be fruitless in the end.
救援任务最终证明是徒劳无功的。
They found their investigation to be fruitless after months of effort.
经过几个月的努力，他们发现调查是无效的。
Their attempts to reconcile were sadly fruitless.
他们试图和解的努力遗憾地无果而终。
Despite repeated tries, their efforts remained fruitless.
尽管反复尝试，他们的努力仍然徒劳无功。
The search for survivors was unfortunately fruitless.
寻找幸存者的工作不幸无果。
Their pursuit of a solution was ultimately fruitless.
他们寻求解决方案的努力最终徒劳无功。
fruitless attempt 徒劳的尝试
fruitless effort 无用的努力
fruitless search 无果的搜索
fruitless endeavor 无效的努力
fruitless discussion 无结果的讨论
fruitless pursuit 无果的追求
fruitless negotiation 无果的谈判
副词: fruitlessly;
