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.
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。
It not only keeps them fit and establishes a hierarchy, but to any viewer it is obviously something the bears enjoy.
这不仅是他们适应和巩固自己等级的方法，同样也是大家看到的北极熊很喜欢做的事情。
First, we'll create the tree viewer that will display the folder hierarchy.
首先，我们将创建显示文件夹层次结构的树查看器。
We want to build a tree viewer that displays the hierarchy of a model.
我们的任务是，构建一个树形的查看器用以显示模型的层次结构。
Hierarchy: What images are the most important and how do I get the viewer to look at those first?
层级：什么图是最重要的，怎样使观察者首先看到这些？
Hierarchy: What images are the most important and how do I get the viewer to look at those first?
层级：什么图是最重要的，怎样使观察者首先看到这些？
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