Children tumble over each other in play.

孩子们玩耍时相互连身翻滚。

youdao

And maybe someone would step on it and tumble over.

或许有人踩上去会摔倒。

youdao

It didn't just tumble over the edge, it actually flew, like a stunt in a James Bond film.

不只是翻滚下去，实际上是飞着的，詹姆斯·邦德电影里面的表演特技。

youdao

But I for one would not be in the least surprised to see rare earth prices tumble over the next few years.

FORBES: The Coming Glut of Rare Earths

In an industry which has seen costs rocket and the value of its product tumble over the last 18 months, producing at less of a loss is welcomed.

BBC: Richard Downes

The neatly set-out wine glasses tumble over onto the trestle table as the knot of camera crews and photographers seethe around the woman who would be President of France, Segolene Royal.

BBC: Segolene Royal