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。

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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。

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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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Dubbed EDGE (for Enhanced Data for Global Evolution), it is available in more than 7, 500 cities, but offers slower download speeds of around 100 to 130 kilobits per second.

FORBES: Mobile Networks Advance To Go

An evolution of ordinary direction services, the 3D capabilities of VZ Navigator VX are available in six cities at launch, including: Chicago, Detroit, Los Angeles, Kansas City, Mo.

ENGADGET: VZ Navigator Version X breaks cover, adds 'virtual city' maps, social features, and more