跪求手机如何工作的英语简介~小短文
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跪求手机如何工作的英语简介~小短文
A mobile phone (also known as a cellular phone,cell phone and a hand phone) is a device that can make and receive telephone calls over a radio link whilst moving around a wide geographic area.It does so by connecting to a cellular network provided by a mobile phone operator,allowing access to the public telephone network.By contrast,a cordless telephone is used only within the short range of a single,private base station.