It is a good idea to make a backup copy and then upgrade the copy before upgrading your production version.
在升级产品版本之前，先做一个复制的备份之后再升级复制，是一个明智的做法。
A transient variable enables the application to keep a copy in local memory, but rebuilds the object if using the backup copy.
临时变量允许应用程序在本地内存中保留副本，但可以在使用备份副本的情况下重新构建对象。
If you don't have a backup copy of the corrupt document readily available, make a copy of the corrupted file right away and store it on removable media.
如果你没有损坏文档的可读备份版本，需马上复制一份损坏文档的备份到可移动介质上。
These backup objects are bound to a specific management class and are stored according to the attributes of the underlying backup copy group (see Archive and backup copy groups).
这些备份对象被绑定到特定管理类，而这些对象的存储则是根据基础备份副本组(请参阅归档和备份副本组)的属性进行的。
Slave servers (for example, those machines that want to provide a backup copy of NIS master databases) copy the published databases from the server.
从服务器（例如希望提供NIS主服务器数据库备份的计算机）将从服务器复制已发布的数据库。
Used by applications to perform backup, copy, and restore operations and associated clean-up tasks for a log shipping configuration without running the backup, copy, and restore jobs.
应用程序可用其执行日志传送配置中的备份、复制和还原操作以及相关的清除任务，而无需运行备份、复制和还原作业。
Unable to revert to the previous copy of the file. It may have been deleted by another program. Please use your backup copy.
无法将该文件恢复到前次备份，可能被其他的程序删除，请使用您的备份文件。
You can copy application information over the network, or you can copy the information from backup files.
您可以在网络上复制应用程序信息，您也可以从备份文件复制信息。
You can copy application information over the network, or you can copy the information from backup files.
您可以在网络上复制应用程序信息，您也可以从备份文件复制信息。
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