Rejoin parallel branches with a join node and then place a single end or stop node, instead of ending parallel branches individually.
利用一个join节点重新联接并行分支，然后放置一个结束或停止节点，而不是分别结束每个并行分支。
A traversal can end at a single node, or at several nodes, or at no nodes at all.
遍历可以结束于单个节点、或多个节点，或者在根本没有节点处结束。
Without parallelism, the stop node has exactly the same effect as the end node, i.e., it ends the single branch through which it was reached.
在不存在并行的情况下，停止节点与结束节点的效果完全一样，也就是说，它将终止到达它的分支。
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