老一辈的科学家很多这样做，或者在自己孩子身上试。

来源: TBz 于 2020-03-03 09:55:01 [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.