北极没有陆地，只有厚厚的冰层。
正在融化的冰层将摧毁广袤的南极荒野。
The melting ice cover will destroy the great Antarctic wilderness.
事实上，我们发现这里根本没有任何冻结多年的冰层。
近来，我们周围的冰层很不稳定。
冰层同时也能够反射太阳辐射。
现在，却只能看到脏兮兮的黄色冰层。
现在，却只能看到脏兮兮的黄色冰层。
同时某些资料指出现存的冰层也在变薄。
But some data also suggests that the ice that remains is thinning.
到了五月，冰层就会破裂，随波至大海。
而关于冰层的许多其他问题也依旧难以解答。
Many other basic questions about ice also remain unanswered.
更糟的是，有迹象显示，冰层减少量正在增加。
Even worse, there are signs that the rate of ice loss is increasing.
今天的北极冰层比近代地质史上任何时期都少。
Less ice covers the Arctic today than at any time in recent geologic history.
这些冰层常常固定在浅海的海底或者大陆架上。
This ice is often held in place by shallow ocean bottoms or continental shelves.
但是，近来我又重新重视冰层起来。
Lately, however, I have turned my mind back to the ice again.
这块告示提醒人们冰层很薄。
唯一不确定的是要多久完整的冰层才会分崩离析。
The only uncertainty is the time it would take for complete ice sheet disintegration.
南极被坚厚的冰层和深厚的雪所覆盖。
The South Pole is covered with solid thick ice and deep snow.
他将手指移到了二十年以前的冰层上。
He moved his finger back in time to the ice of two decades ago.
整个冬天船只被冻在冰层里。
继续添加盐层和冰层，直到它到达瓶颈。
Continue to layer salt and ice until it reaches the neck of the bottle.
你对冰层底部感到好奇吗？
而且消失了的冰层并没有任何恢复的迹象。
我们知道木卫二拥有存在于冰层下的海洋。
全世界的冰层都在融化。
卫星用雷达测定卫星从冰层顶部算起的高度。
The satellite USES radar to measure its altitude above the ice sheet.
在那冰层以下，没有任何人，任何机器人曾经到过那里。
Below that ice cap, no human, no robot had ever been in this place.
冰层之下。
冰层之下。
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