federacies的音標是["fed?r?si]，意思是聯盟、聯邦?；痉g是聯盟體系或團體。速記技巧是注意字母的發音，尤其是元音字母。

Federacy這個詞源于拉丁語，意為聯盟或聯邦。它的變化形式包括federate（聯盟的，聯合的）和federation（聯邦，聯盟）。相關單詞包括confederacy（同盟，聯盟），confederate（同盟者，聯合者），federal（聯邦的），federalism（聯邦主義），confederational（聯邦的），confederation（聯盟，聯邦）等。這些單詞都與聯盟、聯合、聯邦制度有關，強調團結、合作和一致性。

Federacy這個詞在英語中通常用于描述由多個成員組成的聯盟或聯邦組織，這些成員通常有共同的目標或利益，通過合作實現共同的目標。這些組織在政治、經濟、文化和社會領域都有廣泛的應用。

常用短語：

1. inter-federation 聯邦間

2. federated system 聯邦制系統

3. federation of states 國家聯盟

4. confederate states 邦聯國家

5. federation of labor 勞工聯盟

6. federation of trade unions 工會聯合會

7. federation of political parties 政黨聯盟

雙語句子：

1. The United States is a member of the North American Free Trade Association (NAFTA).

美國是北美自由貿易協會（NAFTA）的成員國。

2. The European Union is a federation of nations, with a common currency and a single market.

歐洲聯盟是一個國家聯盟，擁有共同的貨幣和單一的市場。

3. The United Nations is a federation of 193 member states that work together to solve global problems.

聯合國是一個由193個成員國組成的聯邦，共同努力解決全球問題。

4. The International Labour Organization (ILO) is a specialized agency of the United Nations that promotes labor federations.

國際勞工組織（ILO）是聯合國的專門機構，促進勞工聯合會的發展。

5. The World Trade Organization (WTO) is a global federation of trade unions that promotes free trade.

世界貿易組織（WTO）是一個全球性的工會聯盟，促進自由貿易的發展。

6. The political federation of China is composed of the central government and all provinces, autonomous regions, and municipalities directly under it.

中國政治聯邦體制由中央政府和所有省份、自治區、直轄市組成。

7. The federated system has proved to be an effective tool for achieving economic development and social progress in many countries.

聯邦制系統已被證明是許多國家實現經濟發展和社會進步的有效工具。

英文小作文：

Federations are a common feature in international organizations and political systems, allowing different entities to work together towards a common goal. Federations can provide a platform for cooperation, facilitate the exchange of information and resources, and promote the growth and development of their members. In the case of trade unions, federations can provide a voice for workers in a global economy, helping to ensure fair treatment and better working conditions. On the other hand, federations can also be a source of conflict and disagreement between members, as they can sometimes be difficult to manage and coordinate. Nevertheless, federations have the potential to bring about positive change and progress in many areas, providing a framework for cooperation and collaboration among different entities.