都有招數的。普通口罩就不提了。以N95為例，我是用好多天的。一招是輪換，另一招是加個普通口罩擋N95上可能帶的細菌。

來源: 周老大於 2022-01-10 09:19:12 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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