每个讲题都是该范畴综合性性教育内容中的一个要点，既一个“亚概念 (Sub-concept) ” 。这些讲题的内容被分成四个等级 (Levels) 逐渐介绍给不同年龄的孩子，其年龄跨度是从幼稚园高班到高中。
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Because of the fact that future is a sub-concept of time, the conceptualization of future merges with the conceptualization of time.
将来是时间范畴下的一个子范畴，它的概念化与时间的概念化融为一体。
The present study justified the role of feature types of sub-concepts in category effect of combined concept by using feature listing experiment and path model.
本研究通过特征列举实验和建构路径模型，检验概念的特征类型在组合概念范畴效应中的作用。
It is important to note that the temporal operator as described in ECA rule is a more general concept that can apply to conditions within the other sub types of rule.
一定要注意一点：eca规则中介绍的时间操作符是一个通用的概念，可以应用于其他规则子类型中的条件。
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