. . "Yuan zhou lu." . . "圓周率" . . "Shen qi de[] : rang shu xue jia zhua kuang de qi gui shu xue fu hao" . "神奇的π" . . "Shen qi de pai" . . . . . . . "Shen qi de ji" . . "神奇的[] : 讓數學家抓狂的奇詭數學符號" . . . . . "神奇的丌" .