Long ago Mother Nature gave each tree a different purpose.

很久以前，大自然赋予每棵树不同的用途。

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In the case of a tree, you cannot get each tree node as an object.

在树形结构中，您不能将每一个节点当做一个对象。

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But behind each Angle of the walls, behind each door, behind each tree, stood a silent man.

但在每一个墙角上、每扇门后面、每株树的背后，都立着一个不开口的人。

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Future forestry concessionaires will be obliged to attach a bar code to each tree they fell (and the stumps they come from).

ECONOMIST: Forestry

For each tree used in production, 100 are replanted through Vers' partnership with The Arbor Day Foundation and the U.S. Forestry Service.

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Currently, each tree yields only about two gallons of oil a year.

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