1引言微元法,又称元素法,是指从整体中取某一特定的微小部分作为研究对象,从而达到解决事物整体的一种思维方法.微元法是物理学中研究连续变化量的一种常用方法,即把整个复杂、变化的物理过程分解为许多短暂的小过程或把研究对象整体分割成大量的微小的单元来考察,然后通过对这 1 Introduction Micro-element method, also known as elemental method, refers to taking a specific small part from the whole as a research object, so as to achieve a way of thinking to solve the whole thing.The micro-element method is to study the continuous changes in physics A common method is to decompose the entire complicated and changing physical process into many short and small processes or to divide the research object into a large number of tiny units to investigate.