一些住在秘鲁的人离安第斯山脉很近，生活都要依靠山顶的积雪。
For some of Peruvians who live near the Andes, life depends on the snow that's usually on top of mountains.
汤普逊说，1962年研究者在冰层上做了标志，现在发现，山顶的积雪厚度在40年中下降了56英尺。
Researchers put markers atop the ice field blocks in 1962 and Thompson said measurements using satellites show the summit of the ice has been lowered by about 56 feet in 40 years.
附近的山顶上积雪盘桓，小型冰川朝着河谷蜿蜒。
On the nearby mountaintops, snow cover lingers, and small glaciers snake toward the river valley.
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