The structures and performances of all kinds of tree-like spatial indexes are analyzed in this paper.

树型空间索引可以高效地组织并检索高维数据，因此使用树型空间索引是改善聚类性能的有力途径。

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ChengDu wild World is a topic park for dis-playing the wild animals with many kinds of tree, rare plant.

成都野生世界是一处展示野生动物和各种树木、珍稀植物的主题公园。

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The dark powers cling about us, it is said, day and night, like bats upon an old tree; and that we do not hear more of them is merely because the darker kinds of magic have been but little practised.

据说，黑暗之力不分昼夜地缠在我们身边，就像老树上的蝙蝠一样；我们之所以对它们缺乏了解，只是因为这些更加黑暗的魔法很少得到施展。

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Tests running at two big sawmills, in Europe and in America, suggest that the improvement in yield can run from 2% to 18% for different kinds of tree, with an average gain of 10% in the value of the timber produced from a log.

ECONOMIST: Chopping wood

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

Facebook apps transform Facebook into a hub for all kinds of activity, from playing games to setting up a family tree.

WSJ: Facebook in Online Privacy Breach; Applications Transmitting Identifying Information