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层级式档案架构具备较节省空间的特性，但较难使用。
Typically, the hierarchical file structure is more space-efficient but more difficult to use.
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层级式档案也可以被存成长方形档案。
A hierarchical file can be also be stored in a rectangular file.
youdao
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层级式档案也可以被存成长方形档案。
A hierarchical file can be also be stored in a rectangular file.
youdao