Scientists recently studied the effects of mechanical thinning on two kinds of pecan trees in the southeastern United States.

VOA: special.2009.11.10

And the boy uses the trees to do two things, right: to go up, or go out, and come back, to return.

这个孩子用树做了两件事：,上去，出去，回来，落下。

耶鲁公开课 - 现代诗歌课程节选

Researchers say villages where farmers planted trees did better than others during a drought and food shortage in two thousand five.

VOA: special.2011.05.10

There are estimates that only about two hundred fifty mature trees of that species remain.

VOA: special.2010.04.20

Two weeks ago he saw a deer among the trees.

VOA: special.2010.03.20

The Japanese later sent two more gifts of cherry trees.

VOA: special.2010.03.16

Then two natural resources coal and trees became important.

VOA: special.2009.07.20

They suggested evergreen trees for the other two rows.

VOA: special.2009.09.08

It sits under two large palm trees.

VOA: special.2009.03.23

The museum, working with Kew Botanical Gardens, shipped two refrigerated containers full of South African flowers, shrubs and trees for a six-month exhibit.

VOA: standard.2010.08.09