- An avalanche.
一场雪崩 - 100,000 tonnes of snow
十万吨积雪 - travelling at 80 miles an hour,
以一百三十公里的时速席卷而下 - capable of smashing everything in its path.
足以粉碎沿途的一切 - The mountains of North America
北美洲的山脉 - are hit by thousands of avalanches every year.
每年要发生数千起雪崩 - Yet one animal spends the whole winter slumbering
然而有一种动物整个冬季