His local station is handicap accessible, but catching a suburban train known here as the RAR isn't easy, finally he's on his way.

他当地的车站是无障碍的，但是赶上一辆在这里被称为RAR的郊区火车并不容易，他终于上路了。

Within 30 years, London's subway system covered 80 kilometers, with lines in the center of town running in tunnels, and suburban trains operating on the surface, often on embankments.

三十年间，伦敦地铁系统延伸至 80 公里，市中心的铁路在地下隧道通行，郊区的铁路则设在地面上，尤其是河堤上。