She just managed to keep the ball in play.

她把球勉强保持在界内。

《牛津词典》

Some universities already play a critical role in lifelong learning as they want to keep the value of their diplomas.

一些大学已经在推动终身学习中发挥了关键作用，他们想让自己学校文凭保值。

youdao

He observed that if there are too many toys in front of Cameron, he will just keep moving round them and then end up going away and finding something like a slipper to play with.

他观察到，如果卡梅隆面前的玩具太多，他就会一直绕着玩具转，最后会走开，转而找个拖鞋之类的东西玩。

youdao

The young people here are hard at play, and the Muslim elders are hard at work trying to keep them engaged in positive activities.

VOA: standard.2009.12.20

And so if you are a bit of a geek and would like to play net/aces with this you can go to cs50.net/aces and I don't think Willie will give it to you to keep but you can borrow and play for some amount of time in exchange for some feedback on it.

所以，如果你有兴趣并想玩玩这个,那么你可以访问cs50。,但是我觉得Willie不会让你保管它,你可以去借，然后玩一段时间，但作为交换条件,你需要反馈一些意见。

哈佛公开课 - 计算机科学课程节选

Or he may just want Mr Sankoh set free in order to keep him in play in Sierra Leone and to continue taking his cut.

ECONOMIST: Sierra Leone

It crossed my mind that the ball had moved in a funny angle and that Thierry was able to keep it in play given his body position.

BBC: The hand of Henry

"I was just shanking a lot and not able to keep the ball in play, " he said.

BBC: SPORT | Tennis | Seeded trio falter in Monte Carlo