一、前言衣食住行,人之必需。自古以来人类最大苦恼之一是人与货物的运输:横渡河流、穿越高山、遥远距离的行程等,想尽办法以节省时间和气力,让旅程更舒服。从步行手提、肩挑到用力拖拉,直至现代复杂的交通系统。牛顿发现万有引力定律之前,人类就感知到地球引力的存在,人们发现,拖着重物比肩扛着省力。6千多年前人类建造了第一组轮子:木质实心的两个轮子、一根固定的穿过轮子中心的轴及架在其上的平台,车造出来,更省力了。繁体汉字“車”形象地表征了 First, the precepts Basic necessities of life, people’s needs. Since ancient times one of the biggest human distress is the transport of people and goods: across the river, through the mountains, long distances trip, etc., to find ways to save time and effort to make the journey more comfortable. From walking portable, shoulder pick to force drag, until the modern complex transportation system. Before Newton discovers the law of gravity, mankind perceives the existence of the earth’s gravitation, and people find it labor-intensive to drag heavy objects over shoulder. Six thousand years ago humankind built the first group of wheels: two solid wood wheels, a fixed axle through the center of the wheel, and a platform resting on it, which was built to save energy. Traditional Chinese characters “car ” vividly characterized