“用油膜法估测分子的大小”在分子动理论的教学中 ,有着重要的地位和作用 .它可以加深学生对微观世界的认识 ,学会用宏观的方法去解决微观问题 ,更好地使学生掌握分子大小、分子数量及分子质量的数量级 .高中物理第二册 (试验修订本·必修 )中 ,将“用油膜法估测分子的大小” “The estimation of the molecular size by the oil film method” plays an important role in the teaching of molecular dynamic theory. It can deepen students’ understanding of the microscopic world, learn to use macro methods to solve microscopic problems, and better enable students to master Molecular size, number of molecules, and order of magnitude of the molecular mass. In the second volume of high school physics (Test Revision, Compulsory), “The size of a molecule will be estimated by an oil film method.”