为了把握事物的特征,把握它与同类事物不同的属性,学生就需要发展自己的抽象、概括、分析、综合等诸方面的能力;为了表述明确,它又要求语言的简洁和准确地使用概念。说明性的语言通常都是简洁、明瞭的,但也不排斥生动和形象。从某种意义说,说明可以为学生进一步提高记叙、议论和艺术 In order to grasp the characteristics of things and grasp its different attributes with similar things, students need to develop their abilities in abstraction, generalization, analysis, synthesis, and other aspects; in order to express clearly, it also requires language to use concepts concisely and accurately. The explanatory language is usually concise and clear, but it does not exclude the liveliness and image. In a sense, the explanation can further improve students’ narrative, argumentation and art.