One theory is that the glaciation was triggered by the evolution of large cells, and possibly also multicellular organisms, that sank to the seabed after dying.

其中一个理论说，大细胞生物、很可能还有多细胞生物死后沉入海底所散发的气体导致了这个冰河期的出现。

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From single cells to multicellular organisms, is a leap in the history of evolution, but the timing does not need a long period of time.

由单细胞生物到多细胞生物，是进化史上的一个飞跃，但在时间上并不需要漫长的岁月。

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