理论语法与教学语法既有区别又有联系：前者具有前瞻性、创造性和探索性的传统，属理论型的；
There are differences as well as connections between theoretical grammar and pedagogical grammar. The former is fronteering, creative and explorative, thus belongs to the theoretical type;
在介绍了前人的研究及其存在的问题后，系统功能语法作为理论框架被引入，以指导校际英语辩论语篇的分析。
Having discussed the previous studies and their problems, the Systemic-Functional Grammar is introduced as theoretical framework to guide the analysis of IED discourse.
在介绍了前人的研究及其存在的问题后，系统功能语法作为理论框架被引入，以指导校际英语辩论语篇的分析。
Having discussed the previous studies and their problems, the Systemic-Functional Grammar is introduced as theoretical framework to guide the analysis of IED discourse.
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