一幅机械波插图的结论及其应用孙宪宝（吉林省梅河口铁路第一中学，１３５０００）各种版本的高中物理教科书“机械波”一节中都有如图１所示的插图，这是一幅很重要的插图．如果把这幅插图讲得准确、生动、活泼，并能从中总结出规律，对加深理解波以及处理有关波动的习题... The conclusion of a mechanical wave illustration and its application Sun Xianbao (First Middle School, Meihekou Railway, Jilin Province, 135000) In various editions of the high school physics textbook “Mechanical Wave”, there is an illustration as shown in Figure 1, which is an important one. Illustration. If this illustration is accurately, vividly and lively, and the rules can be summed up from it, we will deepen our understanding of the wave and deal with the problems related to fluctuations...