求翻译：其原因在于：通信系统中，信道提供的带宽比较宽，而传送一路的信号需要的带宽却很窄，这样一来，如果一个信道只传送一路信号，将会造成很大的浪费是什么意思？

The reason is : a communication system , the channel bandwidth to provide a relatively wide , and the way of transmission signal required bandwidth is very narrow , so that , if a channel transmitting only one signal , will cause a great waste of

The reason for this is that in communication systems, the channel bandwidth available bandwidth compared to transmit the signal to the bandwidth is very narrow, so that, if a channel is only delivered a signal, the result will be a big waste

Its reason lies in: In the communications system, the channel provides the band width quite is wide, but transmits the band width which a group signal needs very to be actually narrow, as the matter stands, if a channel only transmits a group signal, will be able to create the very big waste

The reason is: communication system, providing broad bandwidth of the channel, while narrow bandwidth of transmission signals all the way, so if a channel transmit signal will cause a lot of wasted

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