We all delete mail accidentally.
我们都会不小心删除邮件。
youdao
Gmail: Gmail is an experiment in a new kind of webmail, built on the idea that you should never have to delete mail and you should always be able to find the message you want.
Gmail是一种实验性质的网络电子邮件，创建它的目的在于可以让你永远没有必要删除邮件，并且总是可以找到你想找到的邮件。
Can only delete mail folders.
只能删除邮件夹。
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