The junior high school physics teacher told a cold joke about the law of conservation: “Anything cannot become thicker as it lengthens!

The situation is constantly changing. To adapt your thoughts to the new situation, you must continue to learn. The physics teacher forgot the most important point when talking about the law of conservation, which is that there is a premise of "inanimate". While he was talking, the female student thought of "life" and laughed. In the end, the teacher realized that she had "not paid attention" and covered up her mistake with a smile.