A dark wall of trees—red spruce, balsam fir, beech, hemlock—surrounds you.

你会被黑暗的树墙包围——红云杉、香脂冷杉、山毛榉和铁杉。

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Soon a dark wall of trees-red spruce, balsam fir, beech, hemlock-surrounds you, and there's a sudden stony persistence.

很快你会被一堵厚厚的树墙包围——红云杉、香脂冷杉、山毛榉和铁杉，这会持续一段时间。

youdao

Soon a dark wall of trees—red spruce, balsam fir, beech , hemlock—surrounds you, and there's a sudden stony persistence.

很快你会被一堵厚厚的树墙包围——红云杉、香脂冷杉、山毛榉和铁杉，这会持续一段时间。

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Mr. WALLY COVINGTON (Northern Arizona University): To try to extrapolate results from hemlock, Douglas fir, western ridge cedar to Ponderosa pine or to loblolly pine is nuts.

NPR: Study: Salvage Logging Boosts Forest-Fire Threat

The western slopes (below 1, 200 meters above sea level) are dominated by douglas fir (Pseudotsuga menziesii) and western hemlock (Tsuga heterophylla).

UNESCO: Biosphere Reserve Information