for

2064 篇文章
For where plants had paved the way,
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For where plants had paved the way, 植物铺平了道路

Without this critical ingredient for life, animals started to suffocate.
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Without this critical ingredient for life, animals started to suffocate. 没有了这种不可或缺的生命成分 动物开始窒息

For those unable to escape the sludge, there was only one possible outcome.
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For those unable to escape the sludge, there was only one possible outcome. 对于那些无法逃离这脏水的生物来说 结果只有一个

plankton had been the catalyst for animal life.
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plankton had been the catalyst for animal life. 浮游生物是动物生命的催化剂

and Dunkleosteus had reigned for 20 million years.
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and Dunkleosteus had reigned for 20 million years. 邓氏鱼已经统治了2000万年

the sharks play for time...
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the sharks play for time... 在等待时机

these fish are balled together for protection.
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these fish are balled together for protection. 这些鱼聚集在一起以寻求保护

For these fish, size is everything.
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For these fish, size is everything. 对这些鱼来说 大小决定一切

He also uses them for one of the most intimidating displays in nature...
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He also uses them for one of the most intimidating displays in nature... 还用颌来展现令人生畏的实力

Luckily for the ammonoid,
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Luckily for the ammonoid, 菊石很幸运