The lexicalization of "yijing" was the synonymy compound of "yi" and "jing".

Modern Chinese synonym compounds is synonymous or nearly two-word formation of the composition of the tie-composite two-syllable words,it is the synonym combination phenomenon reflected in the lexical level.

We studied compounding words composed of synonyms in modern Chinese vocabulary,and analyzed from as-pects of semantics,pragmatics,and attached color etc.

This evolution has resulted in a sharp and consistent definition of competitive advantage, which partially solved the issue of tautology and enhan.

There are three approaches to settle the dispute on whether the principle of natural selection is a tautology: taking a skeptical attitude to the scientific status of the principle of natural selection;redefining the fitness and selection;giving up the received view of the structure scientific theory.

The article makes a thorough analysis of tautology through the investigation of a considerable amount of material of the same language and reaches the conclusion that it is an important figure of speech in linguistic expression.

As one of the most important rhetorical methods,using synonym to avoid repetition has a long history,is also unique in form.

Using synonym to avoid repetition is the rhetoric or rhetoric phenomenon which choose or create synonymous forms in the parallel structure according to their needs.