As we know, one tree can't make a forest.

众所周知，独木不成林。

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One tree can't make a forest, so we need teamwork.

独木不成林，所以我们需要团队合作。

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A bird has flown from one tree to another.

一只鸟从一棵树飞到另外一棵树上。

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One tree is almost 90 meters tall.

VOA: special.2009.01.07

Rituparna looked at one branch and estimated the number of leaves on the tree, but Nala was skeptical.

睿都巴若那查看了一根树枝,然后估算了一个总数,但是那勒仍然心存怀疑

耶鲁公开课 - 金融市场课程节选

That's what the serpent omitted in his speech. He said If you eat of that fruit of the tree of the knowledge of good and evil, It's true in one sense but it's false in another.

这就是蛇的话语中所忽略的，他说,如果你吃了分辨善恶智慧树的果实，从一方面来说它是对的，但从另一方面却是错的。

耶鲁公开课 - 旧约导论课程节选

We already handled far more than our share, and had less than one tree per acre.

CNN: Commentary: Green way to create jobs, save cities

But what stayed with me was the sight of dozens of snowy egrets in one tree.

WSJ: Nicaragua's San Juan River by Boat

The aircraft appeared to have hit at least one tree, but not any buildings directly.

CNN: 1 killed after plane crashes in Los Angeles neighborhood