Electronic mail a method of sending data from one place to another anywhere in the world using telephone wires radio waves optical fibre cable or satellite.
电子邮件把数据从一地点经电话线、无线电波、光学纤维或卫星送往地球上任何地点的方法。
2
The total lance of long distance optical cable increases by 27000 sheet km, that of digital microwave links by 14,400 km and the number of telephone lines by 19.61 million.
新增长途光缆27000皮长/公里,数字微波干线14400公里,电话交换机容量1961万门。
3
The total lance of long distance optical cable increases by 27000 sheet km, that of digital microwave links by 14, 400 km and the number of telephone lines by 19.61 million.