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Ⅰ.IntroductionInformation structure is the organization modelof given and New information in the course ofinformation transmission.A discourse contains avariety of information and not all the informationlisted in the discourse is necessary and useful to us.When we decode a discourse,usually,we do not needto read every word in the discourse or text but skimor scan the discourse or text to search what we thinkis important or useful to us in the discourse as quicklyas possible.Ⅱ.Process Principles of Informati...