low33
幼苗
共回答了27个问题采纳率:81.5% 举报
such这里是代词做主语成分;代替
before many years have elapsed more circuits will be transmitting data than speech.
that it is by no means improbably that before many years have elapsed more circuits will be transmitting data than speech 是从句,补充说明demand.
整句话的意思就是:
其中某些服务过去使用普通电话线路,在若干年之前将要求有比语言方式更多的线路来传送数据,这绝不是不可能的.
1年前
7