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https://blog.international-lan.com/scientists-now-say-they-know-the-simplest-material-for-diy-face-masks-%e7%a7%91%e5%ad%a6%e5%ae%b6%e7%8e%b0%e5%9c%a8%e8%af%b4%ef%bc%8c%e4%bb%96%e4%bb%ac%e7%9f%a5%e9%81%93diy%e9%9d%a2%e7%bd%a9%e7%9a%84/
Scientists now say they know the simplest material for DIY face masks 科学家现在说,他们知道DIY面罩的最简单材料