所谓类概念,是指抽取一类事物、一类行为的共同特征组合生成的概念,它具有“类”的聚合意义,而不是代表着单个事物、单个行为的概念。在类概念中,又可以分离出一层层具有不同涵盖力的类概念。比如“玩具”属于类概念,具体的“积木”则只是单个事物的概念。在家庭生活中,玩具是 The so-called class concept refers to the concept of extracting the combination of common features of a kind of thing and a kind of behavior. It has the meaning of aggregation of “class” rather than the concept of representing a single thing or a single act. In the class concept, you can also separate layers of concepts with different coverage. Such as “toys” belong to the class concept, the specific “building blocks” is only a single concept of things. In family life, toys are