可以向Totals添加表达式统计列，语法是：
Totals.AddExp(Name, Expression)Totals.AddExp(Name, Expression, Caption)Totals.AddExp(Name, Expression, Aggregate)Totals.AddExp(Name, Expression, Caption, Aggregate)
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Post By：2020/9/19 14:59:00 [只看该作者]
