Cows, like humans, produce insulin-like growth factor in response to growth hormones and release it into the blood, and the protein makes its way into their milk.
奶牛和人一样，也能在生长激素的作用下分泌类胰岛素生长因子，这种蛋白质被释放到血液里，从而进入到牛奶中。
One reason this may be so frequently found is because cows have been selectively bred this way to increase the protein content of the cow-milk (a quality desired by dairy producers). 9
其原因之一可能因为牛是通过选择性繁殖的方式来提高牛奶的蛋白质含量（乳品生产者所期望的品质）的。
We've got a division that looks at the breeding of cows to get better attributes out of the milk, more protein for example, maybe less fat, less saturated fat.
我们有一个部门就是研究牛奶的育种，以获得更加优质的牛奶成份，比如蛋白质更多，或许脂肪更少，饱和脂肪更少。
The provision of undegradable protein(fishmeal or protected soya)to the diet of lactating dairy cows is not the best method to raise the protein content in milk and the milk yield.
给产奶牛补加过瘤胃蛋白质如鱼粉和保护的大豆饼粕对提高乳蛋白含量和乳产量并不是最好的方法。
The rye grass also contains rich crude protein and vitamin. Raising cows with it improved the daily fresh milk yield by 17.3 percent.
黑麦草粗蛋白、维生素含量丰富，用黑麦草饲喂奶牛，奶牛日产鲜奶量可提高17 3%。
Abstract: milk protein is one of main substances determining nutritional quality of cows' milk. Milk protein has high nutritional value and contains almost all essential amino acids required by human.
摘要：乳蛋白是决定牛奶营养品质的主要乳成分之一，具有较高的营养价值，含有人体几乎所有的必需氨基酸。
Abstract: milk protein is one of main substances determining nutritional quality of cows' milk. Milk protein has high nutritional value and contains almost all essential amino acids required by human.
摘要乳蛋白是决定牛奶营养品质的主要乳成分之一，具有较高的营养价值，含有人体几乎所有的必需氨基酸。
Abstract: milk protein is one of main substances determining nutritional quality of cows' milk. Milk protein has high nutritional value and contains almost all essential amino acids required by human.
摘要乳蛋白是决定牛奶营养品质的主要乳成分之一，具有较高的营养价值，含有人体几乎所有的必需氨基酸。
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