Cottonwood trees have also been planted to block the sun and cool the river down when the water runs low.

当地还种植了杨柳树遮阳，在水位下降时帮助河水降温。

The men made two new canoes Indian-style, burning and scraping out the insides of cottonwood trees.

这些人制作了两条印度风格的新独木舟，燃烧并刮掉了三叶杨的内部。

Glacier National Park officials have trained a webcam on the cottonwood tree the bear is using, capturing the bear as it delays the end of its hibernation.

冰川国家公园的工作人员在这棵树上装了摄像头，在这只熊延长冬眠的这段时间里捕捉它的一举一动。

A portion of the Texan soldiers took their stand in the Alamo, an old Spanish mission in the cottonwood trees in the town of San Antonio.

一部分德克萨斯士兵站在阿拉莫，这是圣安东尼奥镇白杨树上的一个古老的西班牙任务。