">类产品，产品被编号为</span><span lang="EN-US"><font face="Times New Roman">1~n</font></span><span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，其中第</span><span lang="EN-US"><font face="Times New Roman">i</font></span><span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">类产品共需要</span><span lang="EN-US"><font face="Times New Roman">C<sub>i</sub></fo