Technical abstracts have their own features in terms of communicative functions, linguistic patterns and textual structures.

科技文摘，在语篇结构、文体风格、社会功能等方面具有特定的体裁特征。

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Sentence patterns employed in abstracts and their usage are presented in the paper. It would be helpful for the engineering personnel to learn to write tile abstracts for their papers.

本文还提供了摘要常用的句型及其用法，这将有助于科技人员撰写论文摘要之用。

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