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通信网络是人们工作和生活必不可少的工具,也是经济发展的基础平台之一。通信网络的发展经历了由窄带到宽带、由人工到智能、由单业务
Communication network is an indispensable tool for people’s work and life and one of the basic platforms for economic development. The development of communications networks has gone from narrowband to broadband, from artificial to intelligent, by a single business