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.
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.
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).
删除一个文件通常只是删除了文件的目录项，但数据本身在磁盘上仍然存在。
Deleting a file normally just removes the file's directory entry, but the data itself remains on the disk.
个别使用者可自行关闭共用控制项，以将其加入页面目录，但无法永久删除它。
Individual users can close a Shared control for themselves, which adds it to the Page Catalog, but they cannot permanently delete it.
个别使用者可自行关闭共用控制项，以将其加入页面目录，但无法永久删除它。
Individual users can close a Shared control for themselves, which adds it to the Page Catalog, but they cannot permanently delete it.
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