五千年(敝帚自珍)

主题:快讯,22种婴儿奶粉含有三聚氰胺 -- 百年

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家园 no, there is obvious reason

For most high end products, the manufactures could use their own diary farms, which they have total control of milk production.

With low end products, they use cheap milk bought from diverse sources, which can easily result in the problems we see now.

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