名词
中文翻译：关税同盟
同义词：
['tariff union', 'customs union', 'free trade area']
例句：
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1. TheEuropean Union is a customs union that allows for free trade between its member countries.
欧盟是一个关税同盟，允许其成员国之间进行自由贸易。
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2. The tariff union between the United States and China has been a topic of discussion for years.
美国和中国之间的关税同盟一直是多年来的讨论话题。
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3.The free trade area between the two countries has led to increased economic growth and trade opportunities.
两国之间的自由贸易区已经导致了经济增长和贸易机会的增加。