这个联邦由多个自治州组成，共同遵守中央政府的法律。

The ___federation consists of several autonomous states that follow the central government's laws.

这个联合会由五个不同的环保组织联合组成。

The ___federation is formed by five different environmental organizations working together.

几个小国家决定结成联邦以增强经济实力。

Several small countries decided to form a ___federation to strengthen their economic power.