Continuations以树的结构连接在一起，可以任意访问不同的执行步骤。

The continuations are linked together in a tree structure which allows you to traverse to the different execution steps the way you want.

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XML Infoset与树结构非常相似，而且易于构造不是树的图(只需以不产生明显的根节点的方式连接节点)。

The XML Infoset is very similar to a tree structure and it is easy to construct a graph that is not a tree (just connect the nodes in such a way so that there is no obvious root node).

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TimeoutControl 节点具有一个 In 端子，可以将提供具有特定结构的消息树的源连接到其上（在下面详细讨论）。

The TimeoutControl node has an In terminal to which you wire a source that provides a message tree with a certain structure (discussed in detail below). Elements of this tree include

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