外部文件存储更为灵活，但是无法从数据库管理的持久性和完整性中获益。
External file storage is more flexible but does not benefit from database-managed persistency and integrity.
根据需要，页面区域可以包含对Web站点或者外部文件存储库的链接。
The page area can also contain links to Web sites or external document repositories as needed.
该功能使得在用户的邮件系统和外部的文件存储系统之间进行内容交换更加简单。
This feature makes exchanging content between the user's mail system and the external file storage system easier.
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