第二章和第三章是全文的重点，分别从语用和修辞两方面探讨冗余的功能。

Chapter two and Chapter Three are the most important part of this paper, which expound some positive functions of redundancy from two aspects.

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本文即从语用的角度探析双关语的定义、条件及修辞功能等问题。

This paper presents an analysis into the definition, conditions and rhetoric functions of puns from the pragmatic approach.

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通过对“只要P，就Q”句式分析，准确解释和理解充分条件的含义，了解这一句式的语用功能及修辞作用等。

This article explains the meanings of sufficient condition sentences and the their functions and rhetoric effects by analyzing the sentence form of "If p, then Q".

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