並前往https://chwine.pixnet.net/blog/post/93592106-%E8%98%87%E6%A0%BC%E7%99%BB%E4%BA%9E%E6%B4%B2%E7%89%8812%E5%B9%B4%E5%96%AE%E4%B8%80%E7%B4%94%E9%BA%A5%E5%A8%81%E5%A3%AB%E5%BF%8C-the-singleton-o
