User-Managed Backup 备份和用户管理的备份
User Managed Backup and Recovery 户管理的备份与恢复
user-managed backup and recovery 物理备份
Performing User-Managed Backup and Recovery 操作用户管理的备份和恢复
user managed backup
用户管理备份
以上为机器翻译结果，长、整句建议使用 人工翻译 。
RMAN provides a common interface for backup tasks across different host operating systems, and offers several backup techniques not available through user-managed methods.
RMAN提供了一个通用接口，用于在不同的主机操作系统的备份任务，并提供无法通过用户管理的几种方法备份技术。
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