该代码片段的返回节点是操作响应。
这种操作显示一个用来添加新节点的表单。
The operation that presents a form with which to add a new node.
第四步，也是最后一步，节点之间的整个操作系统配置必须匹配。
Fourth and finally, the entire operating system configuration must match between the nodes.
操作这些单独的节点可以影响页面本身。
By manipulating these individual nodes, you can affect the page itself.
在找到节点之后，标记将对该节点执行特定的操作。
Once the node is found, the tag performs its specific action against that node.
在调用visit的过程中，访问器对节点执行适当的操作。
During the call to visit , the visitor performs the appropriate operation on the node.
此操作将删除当前节点的所有子节点，您要继续吗？
This will delete all of the current node's children, do you wish to continue?
选择并操作场景中的节点。
选择并操作场景中的节点。
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