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Both poles of our planet are covered with ice.
地球的兩極都被冰覆蓋著
They're the largest and most demanding wildernesses of all.
它們是最大、最荒涼的無人區
Nowhere else on Earth is seasonal change so extreme.
兩極地區的季節變化非常極端
It causes the ice to advance and retreat every year.
使得冰蓋面積每年都在擴大和縮小
And all life here is governed by that.
這里的一切生命都受其影響
When the first polar explorers headed south,
第一批極地探險家前往南方時候
giant cathedrals of ice marked their entry into uncharted territory.
經過這里的冰山就標志他們進入了未知領域
Passing the towering spires, they must have wondered what unearthly sights lay in store.
在經過高聳的冰山的時候，他們必曾感慨于地球上竟有如此別樣的地方存在。
As they battled on, the ice became increasingly dominant,
他們繼續南上，觸目皆是寒冰
but nothing could have prepared them for the ice world that finally loomed into view.
當冰雪世界真實的出現在他們眼前的時候，他們感到的是無法用語言形容的震撼。
Terra incognita, "the unknown land".
拉丁語中的“Terra Incognita”，是未知之地的意思。
At the southernmost extreme of our planet, the continent of Antarctica is as large as the United States of America.
南極洲位于地球的最南邊，面積相當于一個美國。
Ninety per cent of all the world's ice is found here.
這里的冰占全世界的90%
This frozen world is largely deserted until the start of spring.
在這個冰封的世界里大部分地方都死氣沉沉，直到春天來臨。
