为了研究物理问题的方便,我们常常运用理想化、简略化等方法,建立起描述某一物理问题的模型,许多物理习题也是依据一定的物理模型进行构思、设计而成的。而“转换”是运用已有的知识和经验从一事物迁移到另一事物、从一现象联想到另一现象、从一过程演变成另一个过程、从一模型 In order to study the convenience of physical problems, we often use idealization, simplification and other methods to establish a model to describe a physical problem, many physical exercises are also based on a certain physical model to conceive, design and made. And “conversion ” is the use of existing knowledge and experience to migrate from one thing to another, from one phenomenon to another phenomenon, evolved from one process to another process, from a model