From a developer's point of view, the challenge is how you can tackle these issues by using the structure of the EPUB.

从开发人员的角度讲，挑战是在于如何使用EPUB的结构来解决这些问题。

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In addition, we add a bit string to each node in the tree to store the prefix of the items. By using the structure we can avoid repeatedly traversing the sub-tree while expanding the patterns.

除此之外，算法对频繁模式树中每个节点增加一个位串来存储该项目的前缀项目，以避免在模式扩展的时候频繁的遍历子树。

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The Houston school system was no longer using the three-story structure, so it was available for use by Katrina evacuees.

NPR: A Charter New Orleans School �� In Houston

He said crews were being helped by Hereford-based recycling company Wye Valley Metals which is using specialist vehicles to remove the structure and contents of the building from the site.

BBC: Scene of fire

Using the new method you could have your cake and eat it, by designing a strong core to a structure that has a weaker, temperature-resistant surface, he says.

ECONOMIST: MONITOR