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世界上到底有多少个城市拥有地铁?目前没有准确的统计。综合各种资料,这个数字应该在114～168个之间。下面对世界上七个城市的地铁系统与特色作一个概览。一、纽约地铁:以快车和慢车分
How many cities in the world have the MTR? There is currently no accurate statistics. Comprehensive information, this figure should be between 114 to 168. Here’s an overview of the subway systems and features in seven cities in the world. First, the New York Subway: Express and slow car points