口罩的細孔的直徑大於病毒直徑。真遇上病毒的話，靠戴口罩來屏蔽病毒是無效的。

來源: OneMoreCent 於 2022-01-10 08:36:15 [舊帖] [給我悄悄話] 本文已被閱讀：次

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