做個疫苗不容易，對於疫苗，有效，有效期長短及安全始終是關鍵，

來源: 楊別青於 2020-02-01 06:54:16 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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