The high prices encouraged the peasants to improve their animal husbandry techniques; for example, they began feeding their animals indoors in order to raise the milk yield of their cows.
高昂的价格鼓励农民提高畜牧业技术；例如，为了提高奶牛的产奶量，他们开始在室内喂养动物。
2
This vitamin is found almost exclusively in animal products, including milk, eggs and cheese.
这种维生素在几乎只存在于动物制品中，如牛奶、鸡蛋和奶酪。
3
And temperature extremes reduce animal production of meat or milk products.