His research areas involve sociolinguistics, discourse analysis, and teaching of the English language.
研究课题涉及社会语言学、语篇分析，英语语言教学等领域。
Schemata theory and context theory are an important part of discourse analysis.
图式理论和语境理论是话语分析的重要内容。
The theories of cohesion and coherence can be applied to direct discourse analysis.
衔接、连贯的理论可以用来指导语篇分析。
Cohesion and coherence are the basic concept and important subject in discourse analysis.
衔接和连贯是话语分析领域的两个最基本的概念，也是话语分析的重要课题。
Cohesion and coherence is a popular issue in the field of discourse analysis.
语篇的衔接与连贯是当代语言学的一个热点。
Cohesion and coherence is a popular issue in the field of discourse analysis.
语篇的衔接与连贯是当代语言学的一个热点。
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