“理据”既可指整个语言的理据性(广义的理据),也可指具体语词的语音和语义最初结合的动因(狭义的理据)。理据性和任意性是共同支配语言的两条同等重要的原则。内部形式是居于复合体内部的微结构,要考察它就需要把它转换成内部形式的展现形式。复合词以其内部形式提供出比单纯词更加丰富的潜台词信息。词有词义,也必有理据,复合词还有内部形式,所以仅仅注意词本身的音义(外部形式)是不够的,只有将此三者作通盘的考虑,厘清它们之间的关系,才可以做出完整的全面的考察。理据和内部形式呈因果关系。内部形式是词义的承载形式,内部形式属于物质范畴,而词义属于意念范畴。理据不仅可以破解不直观内部形式,而且还可以深化对直观内部形式的认识。 “Rationale ” refers not only to the motivation of the whole language (broad motivation), but also to the motivation (narrower rationale) for the initial combination of the phonetics and semantics of a specific term. Motivation and arbitrariness are two equally important principles that govern language. The internal form is the microstructure that resides inside the complex. To investigate it, it needs to be transformed into an internal form of presentation. Compound words in its internal form to provide more than simple words more subtext information. Words have meaning, and they also have reason, compound words and internal forms. Therefore, it is not enough to just pay attention to the semantic meaning (external form) of the word itself. Only by considering these three factors in a holistic way and clarifying the relationship between them can we do A complete and comprehensive study. Reason and internal form was causal relationship. The internal form is the bearing form of the word meaning, the internal form belongs to the material category, and the meaning belongs to the ideological category. Motivation can not only break the non-intuitive internal form, but it can also deepen the understanding of the intuitive internal form.