Three theories were used to support group correction: the theory of Bruffee's collaborative learning, the theory of Piagets constructivism, and the theory of Carl R.
三个理论被用来支持作者的观点，即合作学习理论，建构主义学习理论和罗杰斯的人文主义个性心理学理论。
Three characteristics of brain information processing are summarized: selective, adaptable and cooperative, and neural-group. Selective theory including these characteristics is addressed.
总结脑信息处理的三个特性：选择性、适应性及协同性，并论述了涵盖此三个特性的神经元群选择理论。
Under the circumstances that do not have the aid of group theory, we give three direct ways to calculate the rotation matrix.
在不借助群论的条件下，给出了转动矩阵的三种直接计算方法。
Under the circumstances that do not have the aid of group theory, we give three direct ways to calculate the rotation matrix.
在不借助群论的条件下，给出了转动矩阵的三种直接计算方法。
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