urbanismn.都市生活方式；城市化urbanadj.城市的；都市的urban spatial planning城市空间规划urban space morphology城市空间形态urbanization mechanism城市化机制Urban subsurface space城市地下空间Urban peasant laborers城市农民工urban - rural divide城乡差距Urban Residentiar Area城市住区urban tourist resource城市旅游资源urban flood-fighting城市防洪Urban area of Ningshan宁陕城区