並前往https://ocw.niu.edu.tw/pluginfile.php/532/mod_folder/content/0/Chapter07%20%E5%AE%8C%E5%85%A8%E7%AB%B6%E7%88%AD%20%E5%AE%8C%E6%95%B4%E7%89%88-2.pdf?forcedownload=1