By predicting the destination node channel, each node can communicate with each other.
利用预算出的目标节点的工作信道进行节点之间的通信。
This function takes the source node and copies it over as a child under the destination node.
此函数接受源节点，并将其作为子节点复制到目标节点下。
The destination node may be in another document, in which case the subtree is copied between documents.
目标节点可以在另一个文档中，在这种情况下，在两个文档之间复制子树。
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