- ...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 - caused the population of plankton to increase...
导致浮游生物数量增加 - on an unprecedented scale.
规模空前