travelling at 80 miles an hour, 以一百三十公里的时速席卷而下

82. will survive the perils of the mountain winter.
    才能在山脉的寒冬中存活下来
83. An avalanche.
    一场雪崩
84. 100,000 tonnes of snow
    十万吨积雪
85. travelling at 80 miles an hour,
    以一百三十公里的时速席卷而下
86. capable of smashing everything in its path.
    足以粉碎沿途的一切
87. The mountains of North America
    北美洲的山脉
88. are hit by thousands of avalanches every year.
    每年要发生数千起雪崩

来自《行星地球 第二季 第二集 Planet Earth S02E02 山脉》第 85 行