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即使你从没有用过Internet,你也可能早就听说过电子邮件了。电子邮件是Internet的最普遍最基本的应用,它不仅是人们在Internet上最先学习的内容,而且也常常是
Even if you’ve never used the Internet before, you may have heard of e-mail already. E-mail is the most common and basic application of the Internet. It is not only the content that people first learn on the Internet, but also often