如果你把球滚上斜坡，它还会滚下来。

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

《新英汉大辞典》

他们拿蛋来玩游戏，把蛋滚上小丘，并寻找复活蛋及豆型糖果。

They play games with the eggs. They roll eggs up a hill. They have Easter egg or jellybean hunts.

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但到1984年创造就业机会滚滚上升，里根轻而易获得举重新选举。

But by 1984 job creation was on a roll and Mr Reagan romped to re-election.

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