A coalition could have defeated the government and wrecked the treaty...是什么意思？

A coalition could have defeated the government and wrecked the treaty...

联盟本来可以击败政府并毁掉该条约的。

coalition

n. 结合体，联合，同盟，（两党或多党）联合政府；

例句
Many of the coalition members could have their own political agendas...
许多联盟成员可能会有他们自己的政治议题。

could

aux. “can”的过去式，能够，打算，用于假设语气的条件句，用于虚拟语气的结论句；

例句
The regulations were relaxed and the prisoners could get out and about a bit.
规定有所放宽，犯人可以出去短暂放风。

have

aux. 用以构成完成式及完成式的不定式，表示已经…；vt. 有，具有，拿，取得，从事，必须，不得不；n. 〈口〉有产者，有钱人，富国，〈英俚〉欺骗，诈骗；

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

defeated

v. 击败( defeat的过去式和过去分词 )，战胜，挫败，使困惑；

例句
She defeated developers who wanted to bulldoze her home to build a supermarket.
她打败了那些想推倒她家房屋兴建超市的开发商们。

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。

government

n. 政府，政体，治理的形式，管辖，治理；

例句
The government is to accelerate its privatisation programme.
政府将加快其私有化计划的进程。

and

conj. 和，与，而且，于是，然后，因此；

例句
I spend a lot on expensive jewelry and clothing...
我花很多钱购买昂贵的首饰和衣服。

wrecked

v. 毁坏[毁灭]某物( wreck的过去式和过去分词 )，使（船舶）失事，使遇难，使下沉；

例句
About forty prisoners are still barricaded inside the wrecked buildings.
仍有大约40名囚犯被困在严重损毁的建筑物中。

treaty

n. 条约，协议，协商，谈判；

例句
Delegates signed a treaty to reduce the armouries of conventional weapons in Europe.
各代表签署了协议以减少欧洲的常规武器装备。