【正确答案】It is a key concept which was raised by Halliday. It refers to the existence the mechanism in the language, which can verbal or any written discourse organization into a coherent and unified chapters and make a living language fragment different from a random permutation. eg: 1) John likes football. John likes basketball. John likes football and basketball; 2) Henry kissed Mary in the park. In the park, Henry kissed Mary.

【答案解析】无