英国早在130年前便修出了世界上第一条地下铁道。自打那时候起,世界上已有30多个国家和地区,近70个大城市修建了总长5000公里左右的地下铁道。其中数量最多的当属美国,10个城市拥有1000余公里。其次是前苏联,13个城市有500公里地铁。日本的地铁也很发达,仅东京一个城市就拥有224公里“全地铁”。仅英国伦敦市,便有着406公里的地下铁道。 Britain built the world’s first underground railway 130 years ago. Since then, the world has more than 30 countries and regions, nearly 70 major cities in the construction of a total length of 5000 km of the subway. The largest number is the United States, 10 cities have more than 1,000 kilometers. Followed by the former Soviet Union, 13 cities have 500 kilometers of subway. Japan’s subway is also very well developed, with 224 km of “metro” all in Tokyo alone. In London alone, there are 406 kilometers of underground railways.