在分析中决定主要元素、次要元素和微量元素的分析测定。
Major, minor and trace elements were determined in a single analysis.
有效的单页布局会隐藏掉那些次要的元素。
Effective one-page layouts hide any elements that are not a priority.
现在，在ROLLUP中创建第三个分组元素，这一次要使用month级的属性。
Now create a third grouping element in the ROLLUP, using the attributes of the month level.
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