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Two miles up, the crumbling precipices seem devoid of life.
两英里高的碎石崖上似乎不可能有生命存在
But there are animals here. A grizzly bear.
可是那里仍有动物。一只灰熊
It seems to be an odd creature to find on these high rocky slopes.
很奇怪这样的动物为何会爬到如此高的碎石斜坡上
It's hard to imagine what could have attracted it here.
真不知道这里有什么吸引着它
At this time of the year, bears should be fattening up for the winter,
在每年的这个时候，熊必须为越冬储备脂肪
yet they gather in some numbers on these apparently barren slopes.
然而却有一定数量的灰熊聚集在这片不毛之地
They're searching for a rather unusual food. Moths.
它们正在寻找一种很特别的食物。飞蛾
Millions have flown up here to escape the heat of the lowlands and they're now roosting among the rocks.
为了躲避低洼地带的炎热，数百万只飞蛾抵达此地，栖身于岩石缝隙之中
Moths may seem a meagre meal for a bear,
飞蛾似乎并不足以填饱熊的肚子
but their bodies are rich in fat and can make all the difference in a bear's annual struggle for survival.
但它们身体内富含脂肪，直接关系到灰熊每年冬天的生存能力。
