urbanizevt.使都市化；使城市化urbanadj.城市的；都市的urban ecology-safety城市生态安全urban spatial database城市空间数据库Urban Transport Policy城市交通政策urbanization intensity扩展强度urban traffic blocking城市交通阻塞Urban Railway Transmit城市轨道交通urban spatial theories空间理论urban - rural fringe城乡交错带urban land suitability城市用地适用性urbanization of Russia俄国城市化