例如，如果把一个名为screenElegant 99的产品放在LCD屏幕类别中，查看这个层次结构的人就知道这个产品是一种LCD屏幕。
For example, if you place a specific product named screen Elegant 99 into the category of LCD screens, it tells the viewer of the hierarchy that this product is an LCD screen.
下一个屏幕（图5）显示了一些主要问题类别的选项。
The next screen (Figure 5) shows a few choices for broad categories of problems.
可以使用屏幕左边的树结构进行导航，右边的面板会显示所选类别的详细信息。
The tree structure in the left part of the screen allows for easy navigation and the right hand pane shows the detail of a selected category.
因为CategoriesBean的会话ejb可以使用CategoryData获得每个屏幕更新，所以购物者会立即看到新的类别。
Because the session EJB, CategoriesBean, USES CategoryData for every screen update, the new category is visible to the shopper immediately.
在屏幕顶部，“Groupto View”允许选择特定类别的任务。
At the top of the screen, the "Group to View" box allows you to choose of all the specific tasks.
在屏幕顶部，“Groupto View”允许选择特定类别的任务。
At the top of the screen, the "Group to View" box allows you to choose of all the specific tasks.
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