白杨树（Aspen Tree）是落基山中分布较为广泛的一个树种，一些动物比如鹿等，常以白杨树的树皮为食。
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The leaves of the aspen tree that leaned past the window flickered in the breeze.
NEWYORKER: Beginners
He has embarked on an ambitious plan to regrow stands of the imperiled Aspen tree, protecting them from elk with fortresslike structures made from forest slash.
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Steve Robertson, of NHFT, described aspen as a "charismatic" tree for forest biodiversity.
BBC: Bid to boost 'charismatic' tree
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