i-font-family: Calibri; mso-hansi-font-family: Calibri">国的一个三角剖分</span></u><span lang="EN-US" style="font-size: 12pt; line-height: 150%; mso-bidi-font-size: 11.0pt"><font face="Calibri">)</font></span><span style="font-size: 12pt; line-height: 150%; font-family: 宋体; mso-bidi-font-size: 11.0pt; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">。<u>两人的旅游路线可以看做是连接</u></span><u><span lang="EN-US" style="font-size: 12pt; line-height: 150%; mso-bidi-