Professor Li Baojia takes the initiative in distinguishing between the logical and the linguistic metalanguages and classifies the linguistic metalanguage into three categories, which are vocabulary metalanguage for daily communication, defining metalanguge for dictionary compilation, and semantic metalanguage for lexical analysis.

Wierzbicka s original idea of NSM,which is praised by most scholars,came into being 40 years ago.

The present paper illustrates semantic structures of translating concept, using NSM (natural semantic metalanguage), discusses the relationship between concept and building blocks, concept and events, and concept and function, and describes the process of translating concept and the basic methods.

Analysis on Validity of Natural Semantic Metalanguage;

This paper explores the similarities and differences between the semantic theories of Wierzbicka s Natural Semantic Metalanguage(NSM) and Jackendoff s Conceptual Structure from perspective of semantic primitives.

The natural semantic metalanguage(NSM) approach,advanced by the Polish Semantic School,can be arguably regarded as a new paradigm in contemporary semantics.

In this thesis, we use mostly syntactic congruences and syntactic monoids to study some generalized disjunctive languages and generalized regular languages.