Be aware that you cannot perform a backup on a database that has an existing connection with its client application.
请注意,您无法对正在连接其客户端应用程序的数据库执行备份。
A fairly complex component could use its own library to store contents, define custom roles that are used to tailor its functionality, and participate in backup and restore operations.
更复杂的组件可以使用它自己的库来存储内容、定义定制角色(用来定制功能)并执行备份和恢复操作。
He wants to copy its contents onto a separate backup drive.
他想把电脑中的部分内容拷贝到单独的一个备份盘上。
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