A few years ago, the US Forest Service studied trees in Chicago.

几年前，美国林业局在芝加哥研究树木。

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The Black Death of 1348 was caused by gradual loss of the humus fertility found under forest trees.

1348年的黑死病是由森林树木下腐殖质的逐渐丧失引起的。

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Perhaps the other trees from the forest will come to look at me!

也许森林里的其它树会来看我的！

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Many of the caterpillars live on the leaves of forest trees such as the Dahoma, which can rise more than 8 meters.

VOA: special.2009.01.27

The United States Forest Service soon had trees planted in some areas and a rough road system built.

VOA: special.2009.07.20

Dolly Sods once was covered with a dense ancient forest of red spruce and hemlock trees.

VOA: special.2009.07.20

The system can be monitored by satellite and by measuring trees in the forest, Drax says.

BBC: Biomass may hinder climate fight

He said that there had been a "tremendous reduction" in the total number of trees in the forest.

BBC: Tropical forests 're-shaped' by climate changes

Linked, that is, like dead trees in a forest pulling down new growth.

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