名词
中文翻译：关税同盟
同义词：
['customs union', 'free trade area', 'economic union']
例句：
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1. The European Unionis a customs union that allows for free movement of goods across its member countries.
欧盟是一个关税同盟，允许成员国之间自由流通货物。
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2. The tariff customs union agreement will help to reduce trade barriers and promote global economic growth.
关税同盟协议将有助于减少贸易壁垒并促进全球经济增长。
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3.The tariff customs union has been criticized for its impact on domestic industries and the environment.
关税同盟对国内产业和环境的影响受到了批评。