#英语阅读：欧洲联盟 搜索结果
TheEuropeanUnion(EU)istheworld’slargesttradingunitknownasacustomsunion.Therearecurrentlyfifteenmembercountries.Inacustomsunion,internaltariffsareeliminatedandthemembercountriesformasinglecustomsterritorywitha
