但什么东西可以使真核生物积聚如此之多、甚至有些多余的基因和蛋白质？
But what enabled eukaryotes to accumulate all these extra genes and proteins?
因而，鱼类和贝类由于“生物积聚”积累了极高水平的毒素和化学残留物在鱼肉中。
Consequently, fish and shellfish can accumulate extremely high levels of toxins and chemical residues in their flesh due to "bio-accumulation".
微生物在海底定居并在海泥中积聚。
Microscopic organisms settle to the seafloor and accumulate in marine mud.
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