Accept immediately calls the visit method on the visitor, passing the node as a parameter.

accept直接对访问器调用visit方法，并把节点作为参数传递。

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It USES only a single visit (IPDOMNode node) method, which checks if the visited node is of a certain type.

它只使用单个的visit (IPDOMNode node)方法，该方法检查访问到的节点是否属于某一个类型。

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Visit-node takes a list of visitor functions, each with a signature (fn [node state]) that returns a context map, which can contain the keys: node, : state, : stop, or: jump.

visit - node获取一个访问者函数列表，其中每个函数都有一个返回上下文映射的签名(fn [node state])，上下文映射中可能包含键：node、： state、： stop或：jump。

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