对于脱机备份，需要排它地进行备份，联机备份则允许用户在备份过程中连接数据库。

For offline backup, the exclusive use is required to do a backup whereas online backup allow users to connect while backup is in progress.

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数据库管理员可以使用新增的单用户模式，这是介于静止模式和联机模式之间的一种模式。

As a Database Administrator, you can use a new single-user mode that is an intermediary mode between quiescent mode and online mode.

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