delete (args)针对指定的DN删除目录项，DN是所支持的惟一参数。

Delete (args) Deletes a directory entry for a specified DN, which is the only supported argument.

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dn参数指定此目录项，attribute参数指定要删除的那个属性。

The dn parameter specifies the directory entry and the attribute specifies the attribute to delete.

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更新块中的每个页，使之看上去为空(物理数据仍然在，但是它们的slot目录项被设为已删除)。

Updates each page of the block so that it appears empty (the physical data remains, but their slot directory entries are set to deleted).

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