二个解释：一是来的人都没带病毒；二是来的人都有抗体了。：）

来源: kathyzh 于 2021-01-21 06:31:26 [博客] [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.