Translation equivalence is the central concept of the linguistic school theory,and the central task of translation is to find equivalence in the target language.

It holds that the paradigm of the translation studies school has reversed and transcended that of the linguistic school,thereby conforming to the rule of "scientific revolution" as well as the evolutionary pattern of translation studies the discipline,while at the same time leading to new dilemma of partiality and dichoto.

The 1960s and 1970s witnessed the prosperity of linguistic school in the western translation studies.

In the 1990 s,with the establishment of a solid foundation and the development of translation theories of the linguistic school,the linguistic approach of translation study has acquired a dominant role in China s translation studies,and the tra.

Some linguistic schools have influenced dictionary compiling to some extend.

On the Advantages of Nature Language and the Fading Away of the Artificial Language;

This paper analyzes on the characteristics of natural language and artificial language,expounds the effect of network environment on retrieval language,and points out that the amalgamation or integration of natural language and artificial language is an inevitable trend of the future development of retrieval language.

In order to enhance the quality of keyword index, we can use post-controlled vocabulary, a combination of both natural and artificial languages.