1. The team is currently working on the federation of the new policies.（团队目前正在制定新政策的联盟。）
2. The two countries signed a federation to strengthen their economic cooperation.（两国签订了一项协定，以加强经济合作。）
3. The European Union is a federation consisting of multiple member states.（欧洲联盟是一个由多个成员国组成的联合体。）