If you roll a ball up a slop, it will roll down again.

如果你把球滚上斜坡，它还会滚下来。

《新英汉大辞典》

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Lulu thought since the round hoop can roll, the watermelon can roll too, because it was also round.

鲁鲁想，既然圆环可以滚动，西瓜也可以滚动，因为它也是圆的。

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The group had been nominated seven times before it was finally honored by the Rock and Roll Hall of Fame.

VOA: special.2010.03.19

And the fact of the matter is that rock and roll, which was invented within the lifetime of many of us.

事实上，我们很多人，见证了摇滚的诞生和发展。

普林斯顿公开课 - 人性课程节选

They were little toys that-- they would be shaped like animals or something and you could roll them along the floor.

那些是小型的玩具-,它们可以被做成动物或者其它的形状,你可以拖着它们在地板上跑。

耶鲁公开课 - 金融市场课程节选

But many expect this mission to roll and roll for perhaps a decade or more.

BBC: Nasa's Curiosity rover successfully lands on Mars

You roll out the refrigeration coils, then in summer roll them up for storage.

FORBES: Magazine Article

To start with, it is developing a roll-to-roll process to make amorphous-silicon transistors on plastic film.

ECONOMIST: Just press print