billion

37 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
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
...unleashing the power of a billion atomic bombs...
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...unleashing the power of a billion atomic bombs... 释放出十亿颗原♥子♥弹♥的能量

bombs atomic unleashing power of the billion a
there are more than a billion insects.
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there are more than a billion insects. 超过人类数量的10亿倍

insects than more are billion there a
where life had thrived for more than a billion years,
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where life had thrived for more than a billion years, 生命已在这里繁荣超过10亿年

thrived had than life more where for billion years a
But more than half a billion years ago,
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But more than half a billion years ago, 但是五亿多年前

than more but billion half ago years a
For nearly two billion years,
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For nearly two billion years, 在将近20亿年的时间里

nearly two for billion years
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
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
The first spark appeared four billion years ago.
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The first spark appeared four billion years ago. 第一丝火花出现在40亿年前

spark appeared first four the billion ago years