https://blog.wongcw.com/2021/01/26/%e5%ad%a9%e4%b9%8b%e5%af%b6nerf%e6%8e%a8%e4%b8%89%e6%ac%berival-curve%e6%89%8b%e6%a7%8d%ef%bc%9a%e5%af%a6%e7%8f%be%e9%9b%bb%e5%bd%b1%e3%80%8a%e9%80%9a%e7%b7%9d%e4%bb%a4%e3%80%8b%e7%94%a9%e5%bd%88/