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4391 篇文章
The age of amphibians
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The age of amphibians 两栖动物的时代

amphibians age of the
The evolution from fin to limb took millions of years.
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The evolution from fin to limb took millions of years. 从鳍到肢的进化用了数百万年

limb fin evolution took millions from of the to years
and help them crawl out of the water.
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and help them crawl out of the water. 帮助它们从水中爬出

crawl help out water of them the and
they are different to those of other fish.
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they are different to those of other fish. 叶鳍与其他鱼的鳍不同

fish those different they of other to are
and a new type of fish was thriving,
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and a new type of fish was thriving, 一种新型鱼类蓬勃发展

thriving type fish was new of and a
another group of animals were undergoing their own radical change.
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another group of animals were undergoing their own radical change. 另一群动物正在经历巨变

undergoing own group another change animals radical their of were
that has remained almost the same for hundreds of millions of years.
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that has remained almost the same for hundreds of millions of years. 已经保持了数亿年 几乎不变

remained hundreds same millions almost has for of that the years
They are the most abundant group of animals on Earth.
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They are the most abundant group of animals on Earth. 它们是地球上数量最多的动物

abundant group most animals they of the are earth on
And the evolution of wings
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And the evolution of wings 翅膀的进化

evolution wings of the and
one group of arthropods
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one group of arthropods 一群节肢动物

arthropods group of one