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世界所有的病毒都收集起来放到一个地方会怎么样?它们会占据多大的空间?看起来是怎么样的?全放在一起的话会有一大堆,但人类身上的病毒只占其中很小一部分。引起艾滋病的艾滋病毒已经导致全球数千万人死亡,另有超过3 000万人体内携带着艾滋病毒。这些人中每个人携带的艾滋病毒数量因
What happens when all the viruses in the world come together in one place? What space do they occupy? What does it look like? There are a lot of things that come together, but only a very small part of them . AIDS-causing HIV has led to the deaths of tens of millions of people worldwide and more than 30 million people carry HIV in their bodies. The number of HIV carriers each of these people is responsible for