The Soviet Union invaded and Armenia did not regain independence until 1991.是什么意思？

The Soviet Union invaded and Armenia did not regain independence until 1991.

苏联入侵另一半的疆土,亚美尼亚人直至一九九一年才获独立.

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。

soviet

n. 代表会议，劳工代表会议，苏联，苏维埃；adj. 苏联的，苏维埃的；

例句
During the Soviet era and its immediate aftermath, the region was officially known as 'Middle Asia and Kazakhstan'.
在苏联时代和紧随其后的一段时期，该地区的官方名称为“中亚和哈萨克斯坦”。

union

n. 同盟，联盟，协会，工会，联合，团结；adj. 工会的；

例句
They said goodbye to him as he got aboard the train at Union Station.
当他在联合火车站登上火车之际，他们向他道别。

invaded

v. 侵入，侵略( invade的过去式和过去分词 )，涌入，侵袭，侵犯；

例句
Warriors armed with bows and arrows and spears have invaded their villages.
佩带弓箭和长矛的武士闯入了他们的村庄。

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。

Armenia

n. 亚美尼亚；

例句
Lithuania and Armenia signed a treaty in Vilnius recognising each other as independent sovereign states...
立陶宛和亚美尼亚在维尔纽斯签订条约，承认彼此为独立主权国家。

did

v. 做( do的过去式)，干，学习，研究；

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

not

adv. 不，[用以表示否定、否认、拒绝、禁止等]不是，几乎不，未必，没有[用于否定后面的词或短语]；

例句
It became very clear that the incident was not just an aberration, it was not just a single incident.
事实已经很清楚，这件事不是偶发的，它并不是一起孤立的事件。

regain

vt. 复得，重回，回收，恢复（失物、失地、健康等）；n. 收复，取回；

例句
I'll have to take stock, go carefully and regain my buoyancy.
我将不得不审时度势，小心行事，同时保持乐观。

independence

n. 独立，自主，足够维持闭居生活的收入，独立心，自恃心；

例句
His independence had been forged on the anvil of a harsh environment.
他的独立性是在艰苦的环境中锤炼出来的。

until

prep. 到…为止，在…以前；conj. 到…为止，在…以前，直到…才；

例句
The threat is likely to remain in abeyance until next year's meeting in Reykjavik.
这一威胁很可能会一直存在下去，直至明年的雷克雅未克会议。