並前往https://blog.xuite.net/oknstarruby/blog/33769001-2010.5%E6%88%91%E6%84%9B%E8%98%AD%E5%B6%BClesson+3..%E7%AC%AC%E4%B8%80%E5%A4%A9(%E5%BE%9E%E9%AB%98%E9%9B%84%E5%88%B0%E5%8F%B0%E6%9D%B1)
