Such addressability is absolutely required for a cable system to offer pay-per-view services. 有线电视系统非常需要这种可设定地址能力来提供按次计费的业务。
The traditional CATVs in the country have been gradually annexed by the CATV system operators with great capital. 此时在乡间经营的传统天线也逐渐合并,终于为拥有高资本的有线电视系统经营者所取代。