I've tried to do it, but unsuccessfully. I couldn't breathe and swim at the same time.

我已经试着去做了，但是并不成功，我不能同时游泳和换气。

youdao

However, seen from his viewpoints on epic, religion, and structural poetical theory, this paper holds that "Intellectual Position" is a meaningful but unsuccessfully exploration.

但从其理论来源的史诗现、宗教观和结构主义诗学观方面看，“智力空间”是一次有意义但不甚成功的探索。

youdao

The University of New South Wales had been trying unsuccessfully to commercialize the technology for 20 years, but Shi was determined to find a way.

新南威尔士大学20年中一直在尝试将这种技术商业化未取得成功，但施正荣下决心找到解决方法。

youdao

Felipe tried to rejuvenate it, but unsuccessfully.

CNN: Legend Scolari sacked as Chelsea manager

When Rose grew up, Ruskin proposed, unsuccessfully, but one gets the feeling that marriage was not what he really wanted.

ECONOMIST: Art history

There have been dozens of instances in which Shariah has been invoked in US courts, mostly unsuccessfully, but not always.

CENTERFORSECURITYPOLICY: Louisiana at leading edge in fight against Shariah