高速铁路是我国少有的能走到国际领先地位的成熟技术领域，大力发展轨道交通，需要强大的技术支撑。
High-speed railway is rare in China can go to the international leading mature technology, develop the orbit transportation, need strong technical support.
随着我国大力发展和建设城市轨道交通，其在公共交通体系中所扮演的角色越来越重要。
With the vigorous development and rapid construction of urban rail transit, it plays a more and more important role in the public transport system in China.
由于大城市普遍存在交通拥挤、环境污染和土地资源短缺等问题，大力发展城市轨道交通，被广泛认为是解决这些矛盾和问题的有效途径。
Urban Rapid Rail Transit plays an active and key role to reduce problems such as shortage of land resources, traffic congestions and air pollution that many cities are facing.
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