並前往https://anthonyluisir.tumblr.com/post/68133382574/%E8%B2%A1%E7%B6%93%E8%A9%9E%E5%BD%99-%E5%85%A7%E9%83%A8%E5%A0%B1%E9%85%AC%E7%8E%87internal-rate-or-returnirri10