FED

例句：

1. 1. 名词：联邦
   指一个国家或地区的中央政府
2. 1. The United States is a federal republic.
   美国是一个联邦共和国。
3. 2. The union of the two countries is a federation.
   这两个国家联盟是一个联邦。
4. 3. The government has been trying to improve the welfare of its citizens.
   政府一直在努力改善公民的福利。
5. 2. 动词：使成为联邦
   指使两个或多个国家或地区联合成为一个统一的政府机构
6. 1. The two countries have decided to unite their economies.
   这两个国家决定合并它们的经济。
7. 2. The merger of the two companies will create a new entity.
   两家公司的合并将创造一个新的实体。
8. 3. The union of the two regions will lead to a stronger economy.
   两个地区的合并将导致一个更强的经济。