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今年是牛年,牛对人的贡献不仅是耕田和食用,而且还可用作多种药品原料。牛肉营养丰富,所含的蛋白质比猪肉高一倍,这
This year is the Year of the Ox. The contribution of cattle to people is not only ploughing and eating, but it can also be used as a raw material for many drugs. Beef is rich in nutrients and contains twice as much protein as pork.