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4． Internet上的应用 目前常用的服务有以下几种： （1）Email服务。电子邮件服务可以非常高的速度进行信息沟通，且价格非常便宜。 （2）WWW访问。通过HTTP可以使用浏览器轻松访问互联网世界。 （3）网上聊天。通过浏览器和专用聊天程序可以与网络另一端进行即时的文字沟通。
4. The most commonly used services on the Internet are as follows: (1) Email service. E-mail service can communicate very high speed, and the price is very cheap. (2) WWW visit. Easy access to the Internet world using a browser via HTTP. (3) online chat. Through the browser and dedicated chat program with the other end of the network for instant text communication.