从语用上看，自然语序中S_1P_1 是话题，P 是述题，这也体现了认知语言学中的时间顺序原则。

For pragmatics, the topic is S_1P_1 and the statement is P in natural language, which embodies the principle of temporal sequence in Cognize Linguistics.

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本文探讨了汉语主题结构的特点，提出了四种英译法：1。对应法，因为汉语的主题和述题有时与主语和谓语一致；

The paper explores the characteristics of Chinese topic structure and puts forward three English translation methods:1. corresponding method, because topic is sometimes in agreement with subject;

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研究了题述增稠剂(M - CMHPC)在聚醋酸乙烯乳液(PVA)中的增稠效应。

The thickening effect of the title thickener (M-CMHPC) in polyvinyl acetate emulsion (PVA) has been studied.

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