写作说明文，关键就在按照一定的顺序，用准确、简明、周密的语言，对所反映的事物的本质特征和规律性作出实事求是的说明。说明的方法很多，运用也比较灵活。下面以高中语文课本一至三册的说明文为例，对几种常用的说明方法作些简要介绍。 The key to writing expository writings is to provide practical, factual explanations of the nature and regularity of the things they reflect in a certain order, in an accurate, concise and thorough language. There are many ways to illustrate and use is also more flexible. The following uses the explanatory texts of the high school language textbooks one to three as an example to give a brief introduction to several commonly used explanation methods.