Pruning, like the name implies, involves removing branches of the classification tree.

修剪正如其名字所指，意思是删减分类树的枝条。

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The rough set concept can be of some importance, primarily in some branches of artificial intelligence, such as reasoning, automatic classification, pattern recognition, learning algorithms, etc.

粗糙集理论最初在人工智能的某些分支，例如推理，自动分类，模式识别，学习算法等的研究中是很重要的。

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However, when compared with the results of the traditional classification method, the results showed some differences in some branches.

但与传统分类方法比较，结果有相似之处，但其它分支还存在一定差异。

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We're currently launching a review of current policies by all those agencies responsible for the classification of documents to determine where reforms are possible, and to assure that the other branches of government will be in a position to review executive branch decisions on these matters.

WHITEHOUSE: President Obama: Our Security, Our Values