Also try to reduce the message tree copies or creating new message trees.
还要尝试减少消息树副本或创建新消息树。
Use nodes like compute (which provide the capability to modify the tree) only when necessary, to avoid message tree copies.
仅在必要时使用计算节点（提供修改树的能力）之类的节点，以避免出现消息树副本。
If so, we run an initial pass over the topic that copies the entire tree, while merging any lists that should be together.
如果出现这种列表，就先对主题走一趟复制整棵树，同时合并应该连在一起的列表。
Changes are made by making copies of the syntax tree, replacing portions as one goes along.
想要做出改变，我们需要复制语法树，并替换需要变更的部分。
Compute node (AddBrokerName) reads and copies the message tree.
计算节点(AddBrokerName)读取和复制消息树。
It remains to be seen, though, if newspaper readers are indeed clamoring for a device that simply copies the experience of reading a traditional, dead-tree newspaper.
但是报纸读者是否会真的需要一个只是简单重现了传统报纸的阅读体验的设备，还尚待分晓。
The identity transformation copies each node in the source to the output to provide a logically equivalent tree.
标识转换将源中的每个节点复制到输出以提供逻辑等效树。
The identity transformation copies each node in the source to the output to provide a logically equivalent tree.
标识转换将源中的每个节点复制到输出以提供逻辑等效树。
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