求交通的重要作用的英文介绍

Transport in social production into the production process of transportation and circulation of the transport process. Transport and production activities are realized and the displacement of information transmission, transportation products are people km and t · km measurement, post and telecommunications products by the amount of information and distance measurement. Traffic production facilities have fixed facilities and mobile facilities points. Fixed-line facilities, Hong Kong and stations, courts, Taiwan, and other mobile facilities that cars, boats, aircraft. The world's chief mode of transport routes over 3,000 million meters, of which more than 130 million meters railway, highway more than 2,000 million metres, inland waterway over 50 million meters, the pipeline more than 150 million meters, air routes over 530 million meters. With modern technology and economic development, railway traffic speed of 300 to 400 km, the highway vehicle speed of 200 km, a ship 500,000 ton