大都市群有着大范围的电力照明和特别的道路布局，因此在卫星轨道的高度上都能辨认。
Large urban areas are recognizable from orbit due to extensive electric lighting and distinct street patterns.
因而对我国都市群内城际轨道交通系统进行研究，具有十分重要的理论意义和实践意义。
Therefore, it is need to study the inter-city rail system, and has important theoretical and practical significance.
以丹东和南京两个不同尺度的城市地区为例，分析丹东改造既有铁路为城市轻轨、南京都市圈构建沿江地区城市轨道交通网络对城市形态结构的影响。
Old railway revitalization in Dandong and urban rail transit network along the Yangtze River in Nanjing Megalopolis are analyzed with their impact on urban form and structure.
城市轨道交通作为一种大容量、快速、准时的交通运输方式，不但缓解了城市交通的压力，还促进了整个大都市区结构的形成。
Because of its big capacity, speed, and punctuality, the railway not only relieves the stress of urban traffic, but also pushes the formation of the whole big metropolis structure.
都市里，地铁所构筑出的轨道交通网，年复一年、日复一日地承载着这城市的活力与人们的喜乐、朝暮。
The subway constructs orbital communications network in the city. Load bearing this city vigor and people's pleasant year after year.
都市里，地铁所构筑出的轨道交通网，年复一年、日复一日地承载着这城市的活力与人们的喜乐、朝暮。
The subway constructs orbital communications network in the city. Load bearing this city vigor and people's pleasant year after year.
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