The smooth white trunk of Populus tremuloides, or “Quaking Aspen, ” hides a secret.
这些树干光滑的美洲山杨，或者叫做“颤杨”有着一个秘密。
Among the species headed north are the northern white cedar, American basswood, sugar maple, black ash, big tooth aspen, and yellow birch.
向被迁移的物种包括北部白雪松，美国椴木，糖枫树，黑梣树，大齿白杨和黄桦。
Quaking aspen trees in California's Sierra Nevada Mountains are resplendent in shimmering foliage and white bark.
树木。白杨树在加利福尼亚州的内华达山脉是灿烂的在闪烁树叶和白色树皮。
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