communications service TEF/TCF常用TEF/TCF专四

通讯业务 newcommunications service的英文翻译是什么意思，词典释义与在线翻译：参考翻译通讯业务

The third is the ability of the network to provide a variety of data communications services over aThe third is the ability of the network to provide a variety of data communications services over a

不对称数字用户线（ADSL）的线路测试，基于窄带和宽带特性确定其故障。