未成功

The project was unfortunately unprofitable, despite their initial optimism.
这个项目不幸地没有盈利，尽管他们最初满怀希望。
She tried to solve the math problem, but her efforts were unproductive.
她试图解决那个数学问题，但她的努力没有成效。
His attempt to start a business venture was an unmitigated failure.
他创业的尝试彻底失败了。
The negotiations between the two countries ended in an unsuccessful stalemate.
双方国家的谈判以失败的僵局告终。
The athlete's comeback from injury proved to be an unqualified failure.
运动员从伤病中恢复的努力最终以彻底失败告终。
The surgery was considered unsuccessful due to postoperative complications.
手术后出现并发症，手术被认为是失败的。
Her application for the job was unacceptably unprepared.
她的工作申请准备得极其不充分，无法接受。
The new marketing campaign turned out to be an utter failure, not meeting sales targets.
新的营销活动彻底失败，未能达到销售目标。
Despite intensive training, the team's performance in the match was unsatisfactory.
尽管进行了密集训练，球队在比赛中的表现仍令人失望。
His experiment to create a new material was a monumental unsuccess.
他创造新材料的实验是一个巨大的失败。