Renumber Figure 2 and Figure 3 to Figure 7 and Figure 6 respectively.

把2和3依序重新编为7和6。

If you later add more equations to the paper before the referenced equation, all the equations will automatically renumber and the cross-references will update.

就算以后在前面加入新的公式，它们都会自动编，引用编也会自动修改。