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电子邮件信息的快速传递为网络用户之间的信息交换架起了桥梁。电子邮件既适用于很简短的一张便条，也适用于冗长的文章、信件或程序，使用起来比发送报文简便快捷。局域网在我国逐渐推广应用，用户希望用电子邮件来传递汉字文本。但是电子邮件只能传递ASCII码文件，而汉字文本
The rapid delivery of e-mail messages bridges the exchange of information between Web users. E-mail applies to a very brief note, but also to lengthy articles, letters, or programs that are quicker and easier to use than sending messages. Local area network gradually promote the application in our country, users want to use e-mail to transmit Chinese text. But e-mail can only transmit ASCII files, and Chinese text