...the revolution which toppled the regime.是什么意思？

...the revolution which toppled the regime.

推翻该政权的革命

the

art. 指已提到的人（物），指说话人与听者已知的人（物），用于独一无二的事物前，与形容词最高级和序数词连用；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

revolution

n. 革命，彻底改变，旋转，运行，公转；

例句
He was afraid the revolution they had started would fail...
他担心他们发起的大变革会遭遇失败。

which

pron. 哪一个，哪一些，哪个，那，指前面提到的事物；adj. 哪一个，哪一些；

例句
...the latest date at which a foetus can be aborted.
能够打胎的最迟日期

toppled

v. 不稳而倒下( topple的过去式和过去分词 )，将…推翻，打倒；

例句
He lost his balance, staggered back against the rail and toppled over...
他失去平衡，往后趔趄了一下，撞到栏杆摔倒了。

regime

n. 政治制度，政权，政体，管理，方法，[医]养生法，（病人等的）生活规则；

例句
The new regime has no successful economic reforms on which to build.
新政权没有成功实施可赖以为继的经济改革。