只有当读者将自己的背景知识与语篇负载的语言文字信息联系起来以后，阅读的交际功能才得以完成。
Only when the reader makes a linkage between his background knowledge and the language information of the text can this communicative function be carried out.
因此在语言交际过程中，语篇在不同的语境中就会表现出不同意义与功能。
In the course of language communication, therefore, a discourse can show different meanings and functions under different contexts.
它把语篇作为研究的基本单位，从语篇与语境的互动关系中揭示语言的性质和社会功能。
It conceives of a text as the basic unit and discloses the linguistic nature and social functions from the interaction of text and context.
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