That is: Lack systematicness and unity.
也就是说：缺乏系统性、统一性。
Systematicness is the essential attribute of everything.
系统性是事物的根本属性。
Teaching and material should possess the logic and systematicness of knowledge.
教学教材应具备知识的逻辑结构和系统性。
Teaching and material should possess the logic and systematicness of knowledge.
教学教材应具备知识的逻辑结构和系统性。
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