为自己加油

[翻译]The London Underground is the fourth largest metro system is the world in terms of route miles. It also has one of the largest numbers of stations. The Tube has been an international icon for London.

就路线长度而言，伦敦地铁是世界上第四大地铁系统，也是车站数量最多的地铁系统之一。伦敦地跌已成为伦敦的一个国际标志。