It has the same validity as typing your name in an E-mail or signing a document using a pen.
它与在电子邮件上键入你的名字或者用笔在一份文件上签字具有同样的效力。
Jane is my new pen pal, I often look forward to receiving her e-mail.
简是我的新笔友，我经常期待收到她的电子邮件。
Jane is my new pen pal, I often look forward to receiving her e-mail.
简是我的新笔友，我经常期待收到她的电子邮件。
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