Concept Hierarchy Tree 概念层次树
generalization hierarchy tree 通常用概化层次树
hierarchy-tree 层次树
Glossary hierarchy Tree 词汇阶层树
conception hierarchy tree 概念层次树
logical key hierarchy tree 逻辑密钥层次树
user interest hierarchy tree 用户兴趣层次树
bounding volume hierarchy tree 层次包围盒树
Fault Tree Hierarchy 故障树层次结构
A hierarchy has also a primary specification defining the common set of attributes for each category in the hierarchy tree.
层次结构也有一个主规格，它定义这个层次结构树中所有目录共有的属性。
Android parses the elements of your layout in-order (from the top of the hierarchy tree), instantiating the Views and adding them to their parent (s).
Android依次(自层次树顶层开始)解析你布局中的元素，实例化View并将它们添加到它们的父节点中。
This hierarchy tree can be as simple or complex as you need it to be, and you can build it up using Android's set of predefined widgets and layouts, or with custom Views that you create yourself.
这个层次树可随你所愿的简单或者复杂化，你能使用Android预定义的一套工具和布局来创建它，或者使用你自己定义的Views来创建。
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