不久前,国人谈起全封闭的高速公路,绝大多数都还感到迷惘而不知是何物。然而,曾几何时,国人对高速公路就不再觉得神秘了。高速公路已遍布全国各地。汽车跑快了,更显得火车跑得太慢。尽管每年10亿人次的客运量、20亿吨的货运量把全国57800公里的铁路压得喘不过气来,但中国的老百姓们仍年复一年地感叹“火车太慢、坐火车太累”。 Not long ago, when people talked about the totally enclosed expressway, most people still feel confused and do not know what they are. However, once upon a time, people no longer feel mysterious about the highway. Expressway has spread all over the country. The car ran faster, but it seemed that the train ran too slowly. Despite the 1 billion passenger trips and 2 billion tons of freight delivered to the nation’s 57,800 km of railways each year, the Chinese people still lament year after year “The train is too slow and the train is too tired ”.