Once you select a node (or a collection of nodes), you can find the data you're looking for and manipulate the document when you need to.
一旦选择了一个节点(或一个节点集合)，就可以找到您正在寻找的数据以及在需要时操纵文档。
A binary tree is a collection of nodes in which each node contains two links, one to its left child and another to its right child.
一个二叉树是一系列节点的集合，每一个节点都包含有两个子节点，一个称之为左节点，而另一个称之为右节点。
A Node Group is a collection of machines that form a resource pool.
节点组是一个机器集合，它们形成一个资源池。
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