不少语段有中心句,多数在段首,少数在段中或段尾,有的首尾都有中心句。中心句在语段中有着重要的作用。一、从语意上看,起着概括作用。中心句概括语段的大意,其他句子围绕中心句展开。语段的中心句有点类似文章的标题。有的概括语段的内容,指出范围;有的揭示语段的主旨,说明思想意义。但有不同,标题重在简洁,有的还讲含蓄,中心句偏在明确,注意上下衔接。例如: Many sentences have a central sentence, most of which are in the beginning of the paragraph, a few in the paragraph or at the end of the paragraph, and some have a central sentence at the beginning and end. The central sentence plays an important role in the discourse. First, from the semantic point of view, plays a general role. The central sentence summarizes the general meaning of the segments, and other sentences expand around the central sentence. The central sentence of the segment is somewhat similar to the title of the article. Some of the content of the general language segment, pointing out the scope; some reveal the main purpose of the phrase, explain the ideological significance. But there are differences. The title focuses on conciseness, and some are also subtle, the central sentence is clear, and attention is paid to linking up and down. E.g: