EXPERIENCE
MBDG
Human only oral English for a long time, the form of written language in spoken written record history is very short. System language has become an important tool and the separation of the beast, the text makes human can enter the history of civilization. The transcoding into visual images in spatial and temporal change of visible symbol system, can help the later generations through indirect written imagine pictures, learn about the history and technology experience. Make words become the main carrier of culture.