The effective factors to sample's representation are studied from theory and practice sides.
从理论和实践上探讨影响试样代表性的因素。
Knowledge graph theory is a new method of knowledge representation.
引言知识图是一种特殊的概念图，是属于语义网络的范畴。
Knowledge graph theory is a new method of knowledge representation.
引言知识图是一种特殊的概念图，是属于语义网络的范畴。
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