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在英语科技文献中,从科技内容的严密性、准确性和逻辑性出发,常会使用一些长句子。英语中的长难句都是由基本句型扩展或变化而来的。了解英语基本句型的扩展和变化方式是分析长句型的基础。因此,在分析长难句之前,应把英语基本句型的扩展和变化方式弄清楚。现把英语基本句型的扩展和变化方式简要归纳如下: （一）增加句子的修饰语:定语或状语
In English science and technology literature, we often use some long sentences based on the rigor, accuracy and logic of scientific and technological content. Long sentences in English are extended or changed from the basic sentence patterns. Understanding the basic pattern of English expansion and change is the basis for the analysis of long sentence patterns. Therefore, before analyzing long sentences, we should clarify the way of expanding and changing the basic sentence patterns in English. Now the basic patterns of English expansion and change summarized as follows: (A) increase the sentence modifier: attributive or adverbial