The ball gathered pace as it rolled down the hill.

随着球向山下滚动，它的速度越来越快。

《牛津词典》

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But you do have to remember by butterflying, you are cutting down the overall height of that root ball.

VOA: special.2011.04.19

So, they're sitting down and they're seeing a movie where one character's going to help a ball achieve a goal, and another character's going to hinder the ball.

所以婴儿们坐着看影片,影片讲述一个人极力进球,而另一个人要极力阻挠

耶鲁公开课 - 心理学导论课程节选

They count down the final seconds to midnight as they watch a brightly lit ball slide down a pole on top of a tall building.

VOA: special.2009.12.28

But then the home side lost back-row Robin Sowden-Taylor to the sin-bin for slowing down ball, Priestland kicking the resulting penalty for a 11-6 lead at half-time.

BBC: Blues 9-30 Scarlets

Worse was to follow when Botha was shown yellow for slowing down the ball in the tackle.

BBC: Australia 30-13 South Africa

It was a poor attempt and duly punished when Smith touched down the ball as it dribbled towards the deadball line.

BBC: St Helens 10-18 Leeds Rhinos