研究课题涉及社会语言学、语篇分析，英语语言教学等领域。
His research areas involve sociolinguistics, discourse analysis, and teaching of the English language.
主要研究领域为社会语言学和语言规划学。
His research concentrates on sociolinguistics and language planning.
主要研究领域为社会语言学和语言规划学。
His research concentrates on sociolinguistics and language planning.
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