If the range A1:B1 is referenced in a formula and you insert a new column after column B, the reference is expanded to A1:C1. If the range A1:B1 is referenced and a new row is inserted under row 1, the reference is not expanded, since there is only a single cell in the vertical direction.
如果公式中引用了单元格区域 A1:B1，那么当列 B 之后插入一个新列时，该引用将扩展为 A1:C1。如果引用的是单元格区域 A1:B1，那么在第 1 行之下插入新的行不会扩展引用范围，因为原引用范围在垂直方向上只有一个单元格。