The satellite images may not show what the farmers are using the trees for, but trees provide nuts,fruit, wood and other products.

VOA: special.2009.09.01

And I don't know why, but since time immemorial that is the way computer scientists have drawn trees.

叶子是在最下面的，我不知道为什么,但从记事以来他们就是这么画树的,这也许就是为什么我们。

麻省理工公开课 - 计算机科学及编程导论课程节选

Below them was Bull Run. But the battleground was covered so thickly with trees that the crowds saw little of the fighting.

VOA: special.2009.08.27

But if the monsoon is very strong, the trees affected by that monsoon might put on a wide ring for that year.

VOA: special.2010.05.25

But a new study suggests that many farmers recognize the value in keeping trees.

VOA: special.2009.09.01

But this morning, for the first time in a long time, a few of the trees were green.

VOA: standard.2010.04.01

But in recent decades, the world's forests have been stripped of trees at a rapid pace.

VOA: standard.2010.07.28