ice

126 篇文章
While ice never completely engulfed the planet,
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While ice never completely engulfed the planet, 尽管冰雪从未覆盖整个地球

But south of the ice sheets,
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But south of the ice sheets, 但是在冰层以南

compacted to form permanent ice sheets several kilometers thick.
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compacted to form permanent ice sheets several kilometers thick. 压缩成了几千米厚的永久性冰层

The great Ice Age had begun...
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The great Ice Age had begun... 冰河时期开始

it still endures some of the same freezing conditions that an ice age brings.
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it still endures some of the same freezing conditions that an ice age brings. 这里仍经受着 冰河时代带来的冰冻状态

So when the Ice Age hit two and a half million years ago,
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So when the Ice Age hit two and a half million years ago, 所以 2500万年前 当冰河时代突然袭来之时

it has been too warm for ice to form.
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it has been too warm for ice to form. 温度都太高 无法形成冰冻

The start of an ice age.
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The start of an ice age. 冰河时代开始

Like his Ice Age ancestors,
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Like his Ice Age ancestors, 与冰河时代的祖先一样

almost half the planet's ice had melted.
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almost half the planet's ice had melted. 地球上几乎一半的冰已经融化