The article expounds that the efficiency increase of information retrieval benefits from both a new branch of natural language and various retrieval methods of information language under the environment of digital libraries.

He thinks that the modern society is a "simulation" world on the basis of mass media, where electronic media has changed communication circumstance of media and the new speech situations as well as discourse structure brought constructive significance to subject.

1 Green Paper of B Series,the Annual Report of the Language Situation in China,issued by the State Language Commission is the significant achievement of the investigation and study of national language situations.

As a kind of special spirit production, a kind of special social ideology, musical art takes on the character of creating and imitating, expression with language, symbolizing and suggesting, idea with flowing and so on.