This paper proposes a scheme of certificate revocation management based on binary search trees.

提出了一种基于二叉搜索树的证书撤消管理方案。

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Add and Remove operations are typically expensive since Binary Search Trees require that a tree be balanced.

添加和删除操作的开销是很大的，只主要是因为对半查找树的平衡性所决定的。

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Unlike other self-balancing binary search trees that provide worst case O(log n) lookup time, scapegoat trees have no additional per-node overhead compared to a regular binary search tree.

和其它的提供了最坏情况O（log n） 查找时间的自平衡二分查找树不同，替罪羊树与普通的二分查找树相比，并没有对每个节点增加额外的开销。

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From there you can search cast members, pulling up their family trees to contextualize the show as you watch each episode.

FORBES: Who's Behind the Resurgence of Windows Phone?

Birds of paradise, cassowaries and a variety of other birds can be seen by day, while at night you can search for tree-kangaroos (yes, some kinds of kangaroo live in trees).

BBC: Watching Australia's wildlife