When you reply all, it goes out to everyone on the To line and the CC line. Reply only goes to the sender. When we send out a mail to many people, you might see a sentence that says 'little 'r' me'. This means to use the small R instead of the Big R. That basically means to reply only to me instead of replying to everyone on the mail thread.  

当你回复所有人的时候，它就会发送给在TO栏和CC栏的人，回复只发送到发送者，当我们给很多人发邮件时，你可能会看到一个写着‘little ' r ' me '的句子。这意味着使用小R而不是大R，意思是只回复我，而不是回复邮件中的每个人。

A mail is also referred to as a thread. That is because in the office, a mail can go on back and forth among many people so it becomes a chain of mail that started from one email. I'll use these terminologies in the next several example sentences. 

邮件也被称为线程，这是因为在办公室里，邮件可以在很多人之间来回传递，所以它由一个邮件开始变成了一个邮件链。

在接下来的几个例句中，我将使用这些术语。

"I sent out a mail to the whole group. I requested that they little 'r' me with their ideas."

 我给整个团队发了一封邮件，我要求他们用little 'r' me回复我。

"When I receive a mail sent out to multiple people, I keep forgetting to send to all." 

当我收到一封发给多人的邮件时，我总是忘记发给所有人。

This next sentence is not a spoken sentence. It's a common sentence used in email when someone forgets to send to everyone. 

下一个句子不是一个口语句子，这是一个用于当有人忘记发给每个人的时候的常用句型。

'Resending to include everyone.' 回复给所有人。

If you see this, that means the person sent a reply to the sender instead of replying all. 

如果你看到了这个，那就意味着那个人给了发件人回复，而不是回复所有人。

"Start a mail thread on your idea. I think everyone should get in on this discussion." 

在启动一个邮件流的想法上，我认为每个人都应该参与讨论。

"Do you want me to start a mail thread for this?" 

你想让我为它启动一个邮件流吗?