並前往https://www.spatial-topology.com/2021/04/19/%E3%80%90%E5%8F%B8%E5%9C%96%E8%A7%80%E9%BB%9E%EF%BC%9A%E5%8F%B0%E7%81%A3%E6%95%B8%E4%BD%8D%E5%BB%A3%E5%91%8A%E7%94%A2%E6%A5%AD%E4%BB%8B%E7%B4%B9%EF%BC%88%E4%B8%8A%EF%BC%89%E3%80%91bruce/
