Listing 3 is a rewrite of Listing 2 that makes the tree walking more explicit.

清单3是对清单2的改写，它使得树的遍历算法更明显。

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Therefore XSLT has a built-in tree walking engine that, by default, processes the entire document.

因此XSLT具有内置的遍历引擎，在默认情况下会处理整个文档。

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Instead of relying on the processor to operate the walk, this stylesheet has a named template, main, that implements the tree walking.

为了避免依靠处理程序操作树，这个样式表有一个命名模板main实现了树的遍历。

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An abandoned horse that looked like a "walking skeleton" and was forced to eat tree bark to survive has been rescued from a field in Hertfordshire.

BBC: Maggie the horse

Walking through my favorite part of campus, past an ancient gnarly tree by the faculty club, I came upon three students playing frisbee.

FORBES: A Texas Transplant Returns To Berkeley

As I was walking into work this morning, I saw an evergreen that's probably got a tree trunk two or three feet in diameter that was completely on its side.

NPR: Fires in Texas, Fierce Storms in Midwest