Did you make a backup copy of that file?

那份文件你有备份吧？

youdao

Restore the database using the backup copy.

使用备份副本恢复数据库。

youdao

The management classes consist of archive and backup copy groups.

管理类由归档和备份副本组组成。

youdao

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。

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Chances, are, however, you keep a backup copy of your operating system on an optical disc in the desk drawer, just in case.

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The goal, says Real Networks Vice President Jeff Chasen, is to do away with space-consuming discs and let users create a backup copy of their video collection.

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So, periodically, whenever network traffic permits, the endpoint and the cloud should have a handshake, during which the endpoint updates the cloud with a backup copy of any files unique to that endpoint.

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