英语翻译是BEC商务英语的：整篇文章关于国际电话通信的Onetechnique,knownas"ring-back",involvesgivingacustomerin,say,ParisafreetelephonetoacomputerizedswitchinAmerica.Whenthecustomercalls,theswitchautomatical

　　英语翻译

　　是BEC商务英语的：整篇文章关于国际电话通信的

　　Onetechnique,knownas"ring-back",involvesgivingacustomerin,say,ParisafreetelephonetoacomputerizedswitchinAmerica.Whenthecustomercalls,theswitchautomaticallycallshimbackandputshimthroughtohisAmericandestination.Sincethecalltechnicallyoriginateswiththeswitch,FranceTelecom'smonopolyonoutgoingcallsremainsunbeokenbutthecallerinParisischargedAmericanrates