Since the usual test for protein in animal feed just measures the level of nitrogen, these chemicals can be added to far more expensive feed ingredients without anybody noticing.

因为一般的测定动物食物的测试只测量其中氮的含量，这些化学物质可以被加入昂贵的食物成分中而不为人所知。

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Companies using the milk for further production (e.g. of powdered infant formula) normally check the protein level through a test measuring nitrogen content.

而使用牛奶进行下一步加工(比如婴幼儿配方奶粉)的公司，一般通过测量含氮量来检测蛋白质含量。

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We can now test for drugs that would regulate this protein pathway or optimise it, so it functions as it should in a normal state.

我们现在可以对可调节蛋白路径的药物进行试验或对其进行优化，使它在正常状态下的发挥作用。

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Doctors may therefore have to test for the protein.

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About one-third test positive for a protein called HER2 that makes cancers particularly aggressive, but susceptible to the drug Herceptin.

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Docs already routinely test for one inflammation-producing protein, high-sensitivity C-reactive protein.

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