【BBC地球脉动】冰雪世界 1
Hint:
Terra incognita
1:02s处为破折号 -
英式拼写
http://t1.g.hjfile.cn/listen/201303/201303060812464764988.mp3Both poles of our planet are covered with ice. They're the largest and most demanding wildernesses of all. Nowhere else on earth is seasonal change so extreme. It causes the ice to advance and retreat every year and all life here is governed by that. When the first polar explorers headed south giant cathedrals of ice marked their entry into uncharted territory. Passing the towering spires they must have wondered what unearthly sights lay in store. As they battled on the ice became increasingly dominant but nothing could have prepared them for the ice world that finally loomed into view. Terra incognita - the unknown land. At the southernmost extreme of our planet the continent of Antarctica is as large as the United States of America.地球的南极和北极都是冰天雪地的世界。在所有的荒野之中，它们的面积最大，环境也最严酷。这里是地球上季节性变化最剧烈的地方。每年这种变化都会造成冰层的进进退退。这里的所有生命无不受到这种变化的影响。最早的极地探险者朝南极大陆跋涉的时候，触目所及的都是教堂般高耸的冰峰。他们由此进入一个陌生的世界经过这些矗立的冰峰时，他们对这个未知世界，感到无比地好奇。他们艰难地前行，冰层越来越厚，但他们对将要进入视野的冰雪世界一无所知。这是一个完全陌生的世界。地球最南端的南极洲的面积与美国的面积相当。
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