【简答题】The London Underground (Usually called "the tube") is the biggest subway system in the world. It is also the fastest way to travel in the city. The network consists of nine major routes ( 路线 ), called...
【简答题】The London Underground (usually called “the tube”) is the biggest subway system in the world. It is also the fastest way to travel in the city. The network consists of nice major routes (路线),called “l...