The third part mainly introduces the normaltheory of the mathematics conception learning, give us two basic modes of conception learning: conception From and conception Assimilation.
第三部分，文章从心理学的角度，对概念学习的两种基本形式：概念形成、概念同化进行了分析。
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Instead of normal planets whose composition could be predicted by theory, the planets populating our solar system are unique individuals whose chemical and tectonic identities were create.