奶牛是吃草的，但另外要在飼料中添加穀物以增加蛋白質，比如常見的要用玉米，而玉米多數是轉基因的

來源: 吃與活於 2015-05-15 13:40:00 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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