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》

The ball rolled down the hill.

球滚下了山。

《牛津词典》

The weight of the ball causes the dragon's head to move down and the dragon's tail pulls the water bowl back up.

球的重量使龙头向下移动，龙尾将水碗拉起来。

youdao

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