The current is swiftest in the middle of the river.

河当中水流最急。

《新英汉大辞典》

The grouse season opens in Britain, but which game bird can make the swiftest escape?

英伦松鸡狩猎季节开始，哪种猎禽能胜利大逃亡？

youdao

They have two decades of growing prosperity to point to, certainly the swiftest, most extensive rise out of poverty any nation has seen.

他们会指出中国经历了20年的经济日益繁荣。当然，相对于世界上任何国家来说，也是脱离贫困最快最广泛的国家。

youdao

The reason for that I think is that the early times in which these civilizations arose saw all kinds of dangers coming, and the most--the swiftest, the least suspected, the one that could come upon you overnight came from the sea.

在我看来原因是,在这些文明所诞生的早期世界危机四伏,而来的最迅速,最难以预测,最可能,一夜之间骤然降临的灾难,正来自于海上

耶鲁公开课 - 古希腊历史简介课程节选

But they are a conservative bunch at the ECB and not the swiftest in making changes.

FORBES: A 'Yen' For Your Thoughts

The 28-year-old American simply ran away from the swiftest the rest of the world had to offer.

CNN: THE OUTSTANDING PERFORMANCE

Capitalism is a system wherein capital, i.e. money and credit, finds the smartest and swiftest businesses or entrepreneurs.

FORBES: Keep Geniuses Out of the Post Office