备用文件 meaning in Chinese

back file
backup file

The total space used by the buffers is determined by
备用文件将成为数据库的一部分。
Alternate file system stream names such as
备用文件系统流名称，如
Choosing this option requires that you specify a standby file
选择此选项需要您指定一个备用文件。
Standby files undo files are treated in the same manner
备用文件（撤消文件）的处理方式与此相同。
Specifies the total number of i o buffers to be used for the backup operation
使用备用模式需要一个备用文件，该文件由

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