This traversal is interesting because it is iterative, not recursive, which is a key difference between zipper traversal and the prior clojure.walk implementation.

这种遍历非常有趣，因为它是迭代的，而不是递归的，这是 zippers 遍历与之前的 clojure.walk 实现之间的主要差别。

youdao

That this recursive call had two sub-problems of a smaller size, not one.

而不是一个,这会有很大的不同。

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