若要这么做，开发者需要统一性的销售合约，勾选单选框，将他们的应用程序参与到这个折扣项目中。
To opt in developers need to agree to the new sales agreement paperwork and check a single box to get their apps into the discount game.
扩展到明细允许你查询来自被选单元格中包括计算合计的数据源的记录行。
Expand to detail allows you to query for the rows from the source data that were included for calculating the aggregated value in the selected cell.
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