天上下细菌和病毒
bgr.com/.../06/viruses-in-the-sky-bacteria-atmosphere-earth
news.sky.com/story/viruses-raining-down-from...
www.dailymail.co.uk/sciencetech/article-5359111/Billions-viruses-bacteria-fall-sky-daily.html
www.newsweek.com/viruses-atmosphere-falling-800694
https://blog.sciencenet.cn/blog-39731-1098910.html
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