句子是由多种“结构”组成的。偏正短语即是“结构”的一种。它由偏项和正项两部分组成,偏项是修饰语或限制词,正项是中心语,偏正之间的关系是修饰和被修饰或限制与被限制的关系。偏项对正项的修饰或限制的关键是要得当、准确、合体。有些同志在写文章时往往忽视了这一要求。请看例句: 例1:“科技项目的质量是科研单位的生命……” Sentences are made up of a variety of “structures.” Allegorical phrase is a kind of “structure”. It is composed of partial and positive items. Partial items are modifiers or restriction words. Positive items are central products. Relationships between modalities are modified and modified or restricted and restricted. The key to modifying or limiting a positive item is to be properly, accurately, and properly fitted. Some comrades often neglect this requirement when writing articles. See example: Example 1: “The quality of science and technology projects is the life of scientific research units ...”