那摞摇摇欲坠的书终于倒了下来。

The wobbly stack of books finally ___toppled over.

孩子们在玩耍时不小心撞到了积木塔，把它弄倒了。

The kids accidentally ___toppled the block tower while playing.

民众起义推翻了腐败的政权。

The popular uprising ___toppled the corrupt regime.