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452 篇文章
the ultimate flying insects first appeared back in the ancient swamps.
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the ultimate flying insects first appeared back in the ancient swamps. 最终能够飞行的昆虫 最早出现在古代沼泽中

appeared ultimate flying back ancient swamps insects first in the
Back in Earth's distant past,
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Back in Earth's distant past, 在地球遥远的过去

distant past back earth's in
Back in the ancient seas,
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Back in the ancient seas, 回到古代海洋

back ancient seas in the
But the sharks hold back...
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But the sharks hold back... 但鲨鱼暂时按兵不动

back hold sharks the but
the vertebrates would never look back.
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the vertebrates would never look back. 脊椎动物将永不回头

vertebrates look back would never the
now was a chance to head back up.
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now was a chance to head back up. 现在有机会回到浅海

back chance was head up to now a
Carbon dioxide levels had bounced back,
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Carbon dioxide levels had bounced back, 二氧化碳水平回升

bounced had levels dioxide carbon back
But for those who lived back in the Ice Age,
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But for those who lived back in the Ice Age, 但是对于生活在冰河时期的生物来说

lived who back age those ice for in the but
Far back in the depths of time,
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Far back in the depths of time, 很久很久以前

back depths time far of in the
In the next chapter, we go back to life's origins in the sea...
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In the next chapter, we go back to life's origins in the sea... 下一章 我们将回头探索生命在海洋中的起源

chapter life's origins next back go we sea in the to