unification of four interactions

例句：

1. 1.The government's unification of the two regions has been a major achievement.
   政府将两个地区统一起来，这是一项重大成就。
2. 2.The union of the two countries has brought about significant economic benefits.
   这两个国家的合并带来了显著的经济好处。
3. 3. The unification of the two teams will be crucial in the upcoming match.
   两队的合并将在即将到来的比赛中起到关键作用。