它构建一个表格式的公告列表，这将用在公告区块内容变量中。
It builds a tabulated list of announcements for use in the announcement block content variable.
如果未选择Summary字段，则可以选择该字段来启用表格式的摘要。
If the summary field is not selected, you can select it to enable the tabular summary.
当你偏爱列表样式的数据而不是表格式的数据时，你可以使用简单数据绑定控件。
You would use simple bound controls when your preference for presenting list-style data is as a set of fields rather than a grid.
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