The rocks were tumbling down the mountainside.

岩石从山坡上翻滚下来。

The children enjoyed tumbling down the grassy hill.

孩子们喜欢在草坡上翻滚。

It all comes tumbling down like pack of cards.

就会像一堆纸牌一样崩塌溃败。

As you know, in 2008 it all came tumbling down.

如各位所知，2008年一切都轰然倒塌。

A little spring fell tumbling down and fed the grass.

一条涓涓细流由山坡上奔涌而下,浇灌着这片草地.

They blew the trumpet and the walls came tumbling down.

他们吹响喇叭,那些墙开始倒塌.

The next moment, small pieces of broken stone came tumbling down.

不一会儿，小碎石也开始滚落下来。

You remove one of those cards and the whole thing comes tumbling down.

如果你拿掉了其中的一些牌,所有的一切就是倒坍.

And of course the iron curtains, political walls have come tumbling down.

当然还有铁幕的瓦解，政治壁垒已逐渐消除。

Communication walls, I don't have to tell you -- the Internet -- have come tumbling down.

通信壁垒，不用我多说，随着互联网的出现也已不复存在了。