在计算机网络上，人们可以自由地相互交流而不受时间、地理位置、国籍、种族等因素的限制。
On the Internet, people can communicate with each other freely without having the restriction of time, space, nationality and race.
数字技术的应用不但使计算机数据可以在原来的电视信道中传输，而且也促进了数字视音频数据在计算机网络上的传输。
Date technology application is not only making computer date transmitting in TV channel, but also promoting video and audio date transmitting over Internet.
电子信件邮递系统(ems)是工作在计算机网络上的信息发送、接收和管理系统，是办公室自动化系统中的先进通讯手段。
Electronic mail system (EMS) is envisioned to work in a computer network for message forwarding, receipt and management, it is a sophisticated communication facility in office automation.
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