飛機上安全.病毒分直徑大小.大顆粒自由落體掉下來,除非碰到不帶口罩直射咳嗽的,小顆粒漂浮上空就如氣球也吸不到.

來源: 5181 於 2022-12-01 08:18:44 [舊帖] [給我悄悄話] 本文已被閱讀：次

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