请提供Dr. Deborah Birx的英文原话和出处，谢谢

来源: dudaan 于 2022-07-06 09:42:13 [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.