For example, if your report is displaying product sales and you want a chart representation to the right of your table data, you would add a grid element with one row and two columns.
例如，如果你的报表显示产品销量情况，而你想在表格的右侧增加一个图表，那么你就可以增加一个一行两列的网格元素来完成这个任务。
Every report has at least one top-level report item, usually a grid, a list, or a table.
每一个报表至少拥有一个顶级层次的报表项目，通常是一个格子，一个列表，或者一个表格。
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