生长在西科罗拉多州埃尔克山脉中的颤杨，其叶子会在微风中颤抖，在北美非常普遍。

Quaking aspens like these in the Elk Mountains of western Colorado, whose leaves tremble in the slightest wind, are common across North America.

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在这个傍晚，在此时此刻，它分外美丽，西边山坡上的阴影正在拉长，“三角叶杨的叶子已经变黄；

It is especially beautiful now, on this afternoon, with the shadows growing long down the western slopes, and the "leaves yellow on the cottonwoods;"

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