啊！！！小时候学了两年还是三年这道题，就是学一个新知识点就拿这题出来用新方法做。大家都烦了，然后有同学说，这题反复出现，一定有他的道理，以后肯定特别重要。最近看一个博主说的工程吧好像，就是这道题的延伸。但是我早已忘记如何做这道题了
Aaah! When I was a kid, I learned two or three years, and I did it with a new way of doing it. Everyone was bored, and some of my classmates said, "There's gotta be a reason for this to happen again and again, and it's going to be particularly important." Recently, it's the extension of this topic to a blogger. But I've forgotten how to do it.