一种叫做细菌的细小生物始终在设法侵入你的身体。
Tiny harmful things called germs are always trying to invade your body.
对于那些依赖冰层生存的北极生命而言——无仍是行走于上的北极熊还是寄居于内的细小生物——冰若全部融化将是一场浩劫。
When it disappears, it will be a disaster for all the Arctic life that depends on ice, from the polar bears that walk on it to the tiny creatures that live within it.
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