並前往https://beatri16.pixnet.net/blog/post/134313880-%E5%8D%9A%E5%AE%A2%E4%BE%86-%E5%B0%88%E8%B3%A3%E5%A5%BD%E6%9B%B8%E6%8E%A8%E8%96%A6%E5%8D%9A%E5%AE%A2%E4%BE%86%E6%9B%B8%E7%B1%8D%E9%A4%A8-finite-elemen