One single sputum contains thousands upon thousands of germs and viruses. How many people in Beijing? How many viruses they are gonna produce? U do the maths!
一口痰就含有成千上万的细菌和病毒,北京有多少人?这些人得制造多少病毒和细菌?你自己算算吧。
One single sputum contains thousands upon thousands of germs and viruses. How many people in Beijing? How many viruses they are gonna produce? U do the maths!
一口痰就含有成千上万的细菌和病毒,北京有多少人?这些人得制造多少病毒和细菌?你自己算算吧。
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