Cohesion and coherence is one of the hot topic and focus in discourse analysis.

而在话语分析中，衔接和连贯又是语言学界聚焦和热门的话题之一。

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Ever since Halliday and Hasan made an authoritative research on cohesion in 1976, it has been a crucial research topic in the field of discourse analysis.

从韩礼德和哈桑(1976)对衔接所作的权威性研究至今，衔接研究是语篇研究领域研究中的重要研究课题。

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Extraction of the topic from utterances is part of the discourse analysis in a spoken dialog system.

语句的主题提取是口语对话系统中话语分析部分的工作。

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