Question

英语翻译经济的快速发展和城市化进程的加快,使城市的交通状况面临巨大压力,尤其是大中城市,现有交通系统日渐成为经济持续发展

Answer 1

The rapid development of economy and the speeding up of urbanization, urban traffic is facing huge pressure, especially large and medium-sized cities, the existing traffic system increasingly become one of the bottleneck of sustainable economic development.Foreign experience shows that the urban rail transit system is an effective solution.As the vehicle system dynamics, the improvement of the theory of wheel/rail relationship, vehicle bogie is improved in terms of structure and performance, makes the performance of the vehicle to improve.Urban rail vehicles from an early body bearing in uniaxial model to two by more than two shaft and axle bogie support, two axle bogie has become the main type of bogie in today's all kinds of railway vehicles.Typical of the new type bogie are mainly inside hanging type bogie, the single axle bogie and articulated truck, etc.