This should be because of my interest. I'm the kind of person who doesn't listen in math class. In fact, this reason lies in myself. I like this teacher, but I don't like math, so I haven't heard of it. However, you only need to like math and physics. In fact, you have to force yourself to listen carefully in class, then listen and follow the teacher's ideas, and you will feel very simple. A class passed quickly. But you must understand what the teacher is saying, or you will hate math once or twice.