As recently as five years ago, US migration was twice the rate of European Union states.

就在5年前，美国的移民率还是欧盟国家的两倍。

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The union between the two countries was effected three years ago.

两国合并是三年前实现的。

《新英汉大辞典》

When the Soviet Union crumbled two years later, America was caught unprepared and scrambling for a policy.

当两年之后苏联解体的时候，美国被发现毫无准备，匆忙寻找应对策略。

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President Abraham Lincoln led the Union of northern states in four years of civil war against the southern Confederacy.

VOA: special.2010.01.07

The resurgence of that relationship is a little Romantism in the cold war years when the Soviet Union and India were very warm...had warm relationships, integrated to each other.

印美关系的复苏,在冷战年代完全是理想主义,当时苏联和印度,还保持着非常良好的关系，交往密切。

普林斯顿公开课 - 国际座谈会课程节选

This year, no, not really. Um, years past, I was in a Columbia Political Union,

今年没有，但是去年，我参加了哥伦比亚政治联盟，

写作课程比较难 - SpeakingMax英语口语达人

Over the past four years union membership has fallen by 400, 000, to its lowest level since the 1940s.

ECONOMIST: Labour and the unions need each other more than ever

Patricia Wood, a 60-year-old homemaker, still hasn't moved back into her residence of 34 years in Union Beach that she shares with her husband, a driver for a phone company.

WSJ: Battle of the Beach

They also came two years before the union and GM are actually scheduled to renegotiate their contract.

NPR: GM, UAW Make Deal on Benefits