要不可怜老牛会哗哗的产奶。
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Recombinant somatotropin, rBST?(previously called bovine growth hormone), is a genetically engineered hormone injected into dairy cows to increase milk production. Milk from rBST-treated cows is used in dairy products including ice cream, butter, cheese and yogurt.
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下面提到牛奶；适量，别偏信一个指数，实际上世界上事情都是
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