For your selection list items to be rendered as buttons, you must modify your default rendering set to specify that selection list items should now be rendered as buttons instead of links (Figure 7).
为了让您的选择列表项目以按钮的形式呈现出来，您必须修改缺省呈现集，规定各个选择列表项目应呈现为按钮而不是链接(图7)。
A set of various wireframes, such as product details, list of items, front page, mobile phone.
一套各种各样的线框，比如产品详单，项目表，首页，移动电话。
For example, unset on an item in a list will cause the indices of all subsequent items to be shuffled up; there are no holes allowed in the set of indices.
例如，在列表中的一个项目上使用unset将打乱所有后续项目的索引，索引集中不允许存在任何中断。
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