1.If a step value is given, it will be used as the increment between elements in the sequence.如果给出了step的值，它将被作为单元之间的步进值。

2.Linear Creates a series that is calculated by adding the value in the Step value box to each cell value in turn.单击“等差序列”，获得对每个单元格值依次添加“步长值”框中的值而计算出的序列。