Based on the analysis of GML based data compression characteristics among the mobile computing environment:semantics isomorphism,maintain topology of time and space and self-adaptive compression,the method of GML based data compression model is proposed.

After a brief discussion of synonymous terms, polysemous terms and theory－ specific terms in linguistics, this paper focuses on the illustrations and feature discussions of the 5 types of synonymous linguistic terms classified by their origins.

Based on the theory of metaphor,the paper takes the basic color terms "black","white" and " red" in both English and Chinese as examples to analyze the semantic similarities and differences of the basic color terms.