每一种新的交通工具的问世，都极大地推动着社会的进步。回顾交通工具发展史，我们发现汽车极大地方便了人们的生活，但长途运输能力差，且日益增多的汽车数量使交通拥挤堵塞现象越来越严重；常规轮轨列车的运输量大，但运行速度慢，运行噪声大，爬坡能力低；高速轮轨列车要求 The advent of every new means of transport have greatly contributed to social progress. In retrospect of the history of transportation, we found that cars greatly facilitate people’s lives, but their ability to transport long distances is poor and the increasing number of cars makes traffic congestion more and more serious. Conventional rail vehicles have large amounts of traffic but operate Slow speed, running noise, low climbing ability; high-speed wheel rail train requirements