本文以韩礼德的系统功能语法为基础，从三大纯理功能中的语篇功能出发，对若干律师辩护词的主位进行了统计分析。
This paper, on the basis of the widely accepted Functional Grammar developed by Halliday, attempts to investigate and analyze themes in a lawyer's defense documents.
有些语言学家认为语篇分析是基于语篇内部句子语法层的分析，而系统功能语法中的三大纯理功能则为句子语法层的分析提供了系统的理论和有效的分析方法。
Some linguists hold that context analysis is on the semantic grammatical basis of a context, and the three meta-function of systemic-grammatical grammar provide it a systematic and effective way.
本文从指示语、前提、合作原则、言语行为、关联性等角度，分析了幽默的语用理据。
Some pragmatic motivations, in perspective of deixis, presupposition, cooperation principles, speech acts and relevance, can be found in some concrete humorous utterances.
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