可能是人工和天然都有，所以才有质量等级认定，不然对天然奶就不公平了。

来源: 胡忆于 2018-06-18 19:17:10 [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.