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》

Union between the two countries would be impossible.

这两个国家的联合是不可能的。

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The Soviet-Japan Neutral Treaty, which was a significant issue between former Soviet Union and Japan and among the international relations, has made the both countries each avoid the two route fight.

《苏日中立条约》的签订作为二战期间苏日关系和国际关系中的一个重大事件，使苏日双方得以避免两线作战。

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The new capital of the Russian-Belarussian union may be Smolensk, a Russian provincial town half-way between the two countries' capitals.

ECONOMIST: Ex-Soviet Union

January's dispute between the two countries disrupted gas supplies to western Europe, prompting the European Union to review its approach to energy security.

BBC: NEWS | Europe | Ukrainians protest over gas hike