360 篇文章
Two and a half million years ago,
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Two and a half million years ago, 250万年前

Fifty million years ago,
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Fifty million years ago, 5000万年前

These cubs will stay with their mother for nearly two years...
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These cubs will stay with their mother for nearly two years... 小豹会与母亲待在一起将近两年

Fifty million years ago,
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Fifty million years ago, 5000万年前

as it has done for millions of years.
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as it has done for millions of years. 几百万年来一直如此

Twenty million years later,
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Twenty million years later, 2000万年之后

allowed their primate ancestors to survive in the forest of 50 million years ago.
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allowed their primate ancestors to survive in the forest of 50 million years ago. 使它们的灵长类祖先 能够在5000万年前的森林中存活下来

A supersense honed over millions of years of foraging in the darkness.
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A supersense honed over millions of years of foraging in the darkness. 这是在数百万年夜间觅食的过程中 磨练出来的超凡感官

Within a few million years,
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Within a few million years, 在几百万年内

In the four billion years of life on our planet,
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In the four billion years of life on our planet, 地球生命的40亿年历程中