- that not even early sharks could compete.
以至于早期的鲨鱼也无法与之匹敌 - But Dunkleosteus was to suffer from a devastating quirk of fate...
但邓氏鱼即将遭受毁灭性打击 - ...caused by plankton.
这一切都源于浮游生物 - Billions of years earlier,
数十亿年前 - plankton had been the catalyst for animal life.
浮游生物是动物生命的催化剂 - But now, they would almost bring it to an end.
但是现在 它几乎将动物生命带入终结 - A sudden surge in ocean nutrients
海洋养分激增
Billions of years earlier, 数十亿年前
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