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在崇尚知识经济和信息时代的今天，新技术和高科技的引入给社会各行各业带来了深刻的变革。社会各界对交通运力的数量和质量提出了更高的要求。作为国家经济发展基础的交通运输行业正承受着前所未有的压力。以前那种重数量、轻质量，重速度、轻效益，重外延扩大再生产、轻内涵
Today, as advocating the era of knowledge economy and information, the introduction of new technologies and high technologies has brought profound changes to all walks of life in society. All walks of life put forward higher requirements on the quantity and quality of transport capacity. The transportation industry, which is the basis for the country’s economic development, is under unprecedented pressure. The former kind of quantity, light weight, speed, light efficiency, re-extension of extended reproduction, light content