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.
婉语是一个语言学概念，同时也是一种社会现象和文化现象。
Euphemism as a linguistic concept is also a social and cultural phenomenon.
婉语是一个语言学概念，同时也是一种社会现象和文化现象。
Euphemism as a linguistic concept is also a social and cultural phenomenon.
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