20世纪是汽车诞生和兴隆的时代,可谓是“汽车的世纪”。然而,汽车尾气严重污染大气,地球有限的石油资源将近枯竭,拥挤的交通和频繁的事故时刻困扰着都市居民。在20世纪即将结束的时候,汽车工业也行驶到了一个转折点,环境、资源和安全问题正迫使汽车开发改变前进的方向。 The 20th century is the era of the car was born and booming, it can be said is “car century ”. However, vehicle exhaust pollutes the atmosphere severely, and the limited oil resources on the planet are almost depleted. Urban traffic is plagued by crowded traffic and frequent accidents. Toward the turn of the 20th century, the automobile industry has also reached a turning point where environmental, resource and safety issues are forcing automotive development to change its course.