She took the stairs at a run.

她跑着上了楼梯。

《牛津词典》

He cried and went across the grass at a run.

他哭着跑过草地。

youdao

Looking at all the accusing faces, she felt a sudden urge to run away.

看着一张张脸上那责备的神情，她突然想赶快溜走。

《牛津词典》

They were to prepare for a major battle at a place called Manassas Junction,or Bull Run.

VOA: special.2009.08.20

Milton tells himself to run, and naturally he would have to run fast indeed in order to arrive at a moment in time that had already occurred before he even set out!

弥尔顿告诉自己要跑起来了，而且他也确实不得不跑的很快,从而准时到达,他刚出发时就已经存在的目的地！

耶鲁公开课 - 弥尔顿课程节选

Sometimes when correspondence is saved you run into these kinds of problems, so we have to guess a little bit at what she was looking at.

有时即使资料的确存在,可找不到麻烦就来了，因而，我只能去猜测她的大意了。

耶鲁公开课 - 1945年后的美国小说课程节选

Colin in particular has been really going through the gears, scoring at a run a ball from the start.

BBC: Scots upbeat on World Cup chances

Dowlin played a more reserved innings, scoring at a run-a-ball, but he still managed to guide the home side to victory.

BBC: Windies earn win over Bangladesh

Kallis also scored his 49 at a run-a-ball before being cleaned up by Abdur Razzak, while de Villiers and Morkel produced some late fireworks, hitting seven sixes and five fours between them.

BBC: Amla ton sets up South Africa win