As for how much regret I have, if I may not have experienced it personally, it is estimated that it is not easy to express it in words, and I have never read the name of that book from beginning to end! It was not until last summer vacation that it was sent to be sold as waste-well, it caught my attention ... this is a light yellow book.
One year after the senior high school entrance examination, in order not to lose at the starting line, some active students went to ask teachers in various subjects if they had any teaching materials to look at in advance and deepen their basic knowledge. That time coincided with the physics knowledge contest, and I happened to be one of the "active" students. Due to luck, I unexpectedly passed the preliminary contest, so I had the illusion that I had a good knowledge of physics. On the recommendation of my teacher, I bought a textbook that can help me master physics knowledge better.
I think this textbook is exactly the same as junior high school physics, which can be roughly understood with my basic knowledge and is helpful to the study of senior high school physics knowledge. But ... the fact is that the students who bought it just remembered the color, and the students who didn't buy it told the students who bought it that they couldn't understand it.
When I got home, I glanced at the book and put it aside. I didn't know until I went to high school that everything was the same, just the opposite! It is estimated that only by systematically studying high school physics can we understand words and principles.
Hmm. I regret it. After all, I spent tens of dollars on it. When I sold it, it was fifty cents a catty. I think I only sold 50 cents. That's a new book without a name!