推荐回答（1个）
美国地铁一般指subway，但美国之外，metro是通用词汇表示任何国家的地铁系统。
metro和subway区别：
1、metro是法语Metropolitan Railway in Paris <法国>巴黎地下铁道的缩写；现在可以指任何国家的地铁系统。
The accessibility construction work of Guangzhou Metro, Baiyun International Airport, and Guangzhou East Station has been finished.
广州地铁、白云国际机场、广州火站东站等重点场所的无障碍设建设和改造已完成。
2、subway美语地铁，指美国地铁系统。
there is the Bay Area Rapid Transit subway system in San Francisco.
旧金山海湾地区有地铁捷运系统。
3、subway在英式英语指地下通道，地下人行道，而美语地下通道，地下人行道是underpass。要注意区别。
The majority of us feel worried if we walk through a subway.【英语】
大多数人在走地下通道时都感到害怕。
The Hanger Lane underpass was closed through flooding.
【美语】
发洪水期间，汉格巷地下通道被关闭。
4、英式英语地铁系统是tube，来源于伦敦的地铁，后来指泛指英国地铁系统。
The tube used to refer to the underground railway system in London.
The tube过去指伦敦的地铁系统。
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