这封邮件的一个副本会存在于 Kaylee 的发件箱，另一个副本会出现在 Zoe 的收件箱。

A copy of that message stays in Kaylee's sent box, and another copy appears in Zoe's inbox.

youdao

如果一个核心修改了这个副本，那么其它副本也必须更新。

If one of the cores modifies its copy, all the other copies have to be updated.

youdao

您可以增加新的副本，并将工作从其他副本转移到新副本，以减轻其他副本的负载。

You can add new copies as well as shift work away from and release other copies.

youdao

You can make multiple--you can put three or four-- the copy gets worse and worse each time, but you've got multiple copies.

你也可以复写多份，放上三四张复写纸-,不过越往下复印的效果会越差，但终归你还是有了多份副本。

耶鲁公开课 - 金融市场课程节选

So let them send you their copy, and you send a copy of this letter to them.

所以叫他们把副本送给你们，你们则把这封信的副本送给他们。

耶鲁公开课 - 新约课程节选

You really need that because if you have only one copy of something, you don't have a backup; so, you can store the one copy separately.

你真的很需要这项发明,因为要是你只有一份的话，你就没有备份;,这样的话，你就可以将副本单独留存。

耶鲁公开课 - 金融市场课程节选