| 释义 |
窄带 zhǎidàinarrow band窄带数字通信中通常指传输速率低于64千比特/秒的网络接入方式narrowband众所周知，电信业发展的总体趋势是，从有线到无线，从窄带到宽带，从语音业务到数据业务。 Everybody is aware that the general trends in the development of the telecommunications industry are the move from wired to wireless, from narrowband t |