物理教学中有许多概念比较抽象，难懂难记，如果用严格的逻辑定义去陈述或解释，则愈讲愈糊涂，最后还是难于理解。为了把概念讲清，使学生加强理解和记忆，可采取形象的比喻手段，这样可以改变思路，以退为进，化难为易，使人豁然开朗。下面举例说明比喻在物理概念教学中... There are many concepts in physics teaching that are relatively abstract and hard to understand. If you use strict logic to define or explain, the more you get confused, the more difficult it is to understand. In order to clarify the concept and enable the students to strengthen their understanding and memory, they can adopt an image metaphor, which can change their thinking, retreat into advancement, make it difficult to make progress, and make people suddenly see the light. The following example illustrates metaphors in the teaching of physical concepts...