On large amount of document category quantity, hierarchical text classification is an effective approach.
在文本分类的类别数量庞大的情况下，层次分类是一种有效的分类途径。
The product of finite amount of objects in the category Lip is discussed.
证明了此范畴的任一有限族对象都存在积。
The product of finite amount of objects in the category Lip is discussed.
证明了此范畴的任一有限族对象都存在积。
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