文档可以还原到前一版本。

A document can be restored to a previous version.

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是否确实要现在取消？如果选择“是”以取消更新，计算机将重新启动并还原到更新前的状态。

If you select Yes to cancel the update, the computer will be restarted and restored to the state it was in before the update.

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如果在创建、更新或者删除一个实体bean时发生错误，那么可以还原到数据库的前一状态并且通知用户存在问题。

If an error occurs while creating, updating, or deleting an entity bean, the previous state of the database can be restored, and the user can be notified that there was a problem.

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