防新冠病毒，戴口罩没用，是美国首席传染病专家说滴。。

来源: pickshell 于 2020-08-01 13:34:43 [旧帖] [给我悄悄话] 本文已被阅读：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.