Iteration essentially consists of three operations: start (find the start loc from the root node); next (given a loc, find the next loc), and end?

迭代实际上包含三种操作：start(从根节点处查找start loc)； next(给定一个loc，查找下一个loc)，以及end ？

youdao

The root element's beginning and end tags surround your XML document's content.

根元素的开始和结束标记用于包围XML文档的内容。

youdao

I guess it's for this reason that I love the Crown Pop-up sink stopper idea; the exposed top end stays clean while the root-ish tail end catches the hair and goop.

我想这也许是我为什么这么喜欢这款下水漏的原因吧。你看，暴露在外的上表面一直很干净而下面的像根一样的尾巴就会把头发截留下来了。

youdao

He also pledged to end no-bid contracts in Iraq, root out waste and abuse in entitlement programs such as Medicare and Medicaid, require every Cabinet member to scrub department budgets "line by line, " and reinstate a "pay as you go" rule from the 1990s.

CNN: Obama pledges to cut deficit in half at fiscal summit

At the southern end of the growing range, the trees are thriving and hundreds of saplings are taking root.

BBC: NEWS | Science/Nature | Climate threat has plants quivering