The industrial evolution of central cities enjoys advantageous scale economy, preferential exterior economy and strength in structural transformation.
中心城市产业演化具有规模经济的优势、外部经济的优势和结构转换能力的优势。
This article introduces the features of soft_starter and converter, the procession of the technology evolution and its applications in water supply system for cities.
介绍软启动器、变频器的特点，技术演变过程及在城市供水系统中的应用。
Urban traffic is a complex subsystem in the whole urban social systems, and it plays a unique and important role in the evolution of cities with more and more attention.
城市交通是整个城市社会系统中的一个复杂的子系统，在城市更新演进过程中起到了独特而重要的作用，越来越受到人们的重视。
Urban traffic is a complex subsystem in the whole urban social systems, and it plays a unique and important role in the evolution of cities with more and more attention.
城市交通是整个城市社会系统中的一个复杂的子系统，在城市更新演进过程中起到了独特而重要的作用，越来越受到人们的重视。
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