Actually, up to 70% of the grass-fed cattle's energy requirements come from short-chain fatty acids, which are produced as a result of microbial fermentation of the grass in the foregut of the cow.

实际上，草饲牛 70% 的能量均来自于短链脂肪酸，而这些脂肪酸都是经过生长于生肠中的微生物发酵形成的。