So, they don't start killing all the cells in your respiratory system; they only kill the cells that are harboring the virus.

所以它们不会杀死所有呼吸系统内的细胞,只杀死那些被病毒感染的细胞

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You breathe it in, it infects the cells of your respiratory tract, and the virus begins to reproduce, and then it spreads throughout your body.

你将之吸入,病原体感染了呼吸道细胞,病毒开始繁殖,接着传遍你的全身

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Before B1 begins, you've got the body working, functioning, in its bodily way--respirating, reproducing the cells, and so forth and so on.

在B1之前,你的身体还在运作,正常运作,也就是机体上的呼吸,复制细胞,诸如此类

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That virus is reproducing inside cells of your respiratory tract.

病毒在你的呼吸道细胞内繁殖

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