four

97 篇文章
an unbroken line of ancestry stretching back four billion years
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an unbroken line of ancestry stretching back four billion years 一条绵延40亿年的连续谱系

ancestry stretching unbroken back line an four of billion years
...four meters long...
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...four meters long... 4米长

meters long four
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

life four of in the planet our on billion years
Four thousand meters up, the Altiplano desert in Chile...
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Four thousand meters up, the Altiplano desert in Chile... 海拔四千米的智利阿尔蒂普拉诺沙漠

altiplano meters chile thousand desert up four in the
In the four million years since the Permian extinction...
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In the four million years since the Permian extinction... 二叠纪灭绝之后的400万年中

permian extinction million since four in the years
Four flexible wings,
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Four flexible wings, 四片灵活的翅膀

flexible wings four
can trace its heritage back four billion years.
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can trace its heritage back four billion years. 都可以追溯到40亿年前

trace back heritage can four its billion years
At four different times,
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At four different times, 在四个不同的时期

different times at four
The rise and fall of these dynasties, over four billion years,
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The rise and fall of these dynasties, over four billion years, 40多亿年来 这些王朝的兴衰

dynasties fall rise these four of the over billion and years
of four limbs and a backbone
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of four limbs and a backbone 拥有四肢和一根脊椎

limbs backbone four of and a