Like other viruses, it cannot replicate on its own but must hijack a cell and turn it into a virus factory.
像其他病毒，不能自我复制，而必须劫持一个细胞，并把它变成病毒工厂进行复制。
We can see its family tree - and its daddy was a virus that evolved in the artificial breeding ground of a vast factory farm in North Carolina.
我们能看到这个病毒的谱系，它的上代病毒是北卡罗莱纳州一个大型集约化动物农场的人工繁殖基地中演化出来的一个病毒。
We can see its family tree - and its daddy was a virus that evolved in the artificial breeding ground of a vast factory farm in North Carolina.
我们能看到这个病毒的谱系，它的上代病毒是北卡罗莱纳州一个大型集约化动物农场的人工繁殖基地中演化出来的一个病毒。
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