In each region, one or two tags are embedded as the nodes where you will create a chart or radio button group.
在每个区域中，有一个或两个标记被作为节点嵌入，您可以在其中创建图表或单选按钮组。
For a group of radio buttons or check boxes, the label should be for each individual button, not the header above the button group.
对于单选按钮组或复选框来说，每个按钮都应该有标签，而不是在按钮组上方有一个标题。
For example, if the user is asked to select one item from a list, a Web browser might present the list as a standard radio button group.
比方说，如果要求用户从列表中选择一项，Web浏览器可以用标准的单选按钮组来表示列表。
Defining a radio button group tells the user, "Here is a set of choices from which you can choose one and only one."
定义单选按钮组将告诉用户：“这里有一组选项，您可以从中选择一个且只能选择一个。”
Defining a radio button group tells the user, "Here is a set of choices from which you can choose one and only one."
定义单选按钮组将告诉用户：“这里有一组选项，您可以从中选择一个且只能选择一个。”
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