与此同时 ， 要想知道加工食品标签上的哪些成分对健康有利 ， 哪些成分对健康不利 ， 变得更加困难了 。The additives which we eat are not all so direct. . 我们吃到的这些添加物并非都是如此直接的 。
Farmers often give penicillin to beef and poultry, and because of this, penicillin has been found in the milk of treated cows. 农民常给牛和家禽注射青霉素 ， 因而在受过注射的牛所产牛奶里发现青霉素 。Sometimes similar drugs are administered to animals not for medicinal purposes, but for financial reasons. 有时让家禽服用这类药物并非是为了治病 ， 而是为了经济上的缘故 。
The farmers are simply trying to fatten the animals in order to obtain a higher price on the market. 农民们只是想使家畜长得更肥壮可以上市场上卖到好价钱 。Although the Food and Drug Administration (FDA) has tried repeatedly to control these procedures, the practices continue. 虽然食物和药品管理局已一再设法控制这种情况的发生 ， 但是这种行为仍在继续 。
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