She will sit under the tree thinking of the happy days.

她常坐在树下回想那些快乐的时光。

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While Ben was working in the sun, Tom sat under a tree eating the apple and thinking how to catch more boys.

当本在太阳下工作时，汤姆坐在树下吃苹果，想着如何吸引更多的男孩。

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Fuzzy decision tree is the generalization of decision tree in fuzzy environment, and the knowledge represented by fuzzy decision tree is more natural to the way of human thinking.

模糊决策树是决策树在模糊环境下的一种推广，它作为一种知识表示形式更符合人类的思维。

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His mission: to create the world's first zero-emission, hydrogen-based economy--and to pull it off through no-nonsense business principles, not tree-hugging wishful thinking.

FORBES: Mister Natural