並前往https://learn.theball.com.tw/%E5%85%88%E5%88%A5%E6%80%A5%E8%91%97%E9%8C%84%E9%9F%B3%E5%92%8C%E6%B7%B7%E9%9F%B3%E4%BA%86%EF%BC%8C%E4%BD%A0%E8%81%BD%E9%81%8Esignal-flow%E5%97%8E%EF%BC%9F/