For the farmer who takes care to keep them cool, providing them with high-energy feed, and milking them regularly, Holstein cows are producing an average of 2,275 gallons of milk each per year.

对于那些照顾它们保持凉爽，给它们提供高能量饲料和定期挤奶的农场主来说，荷尔斯坦奶牛平均每年能产2275加仑的牛奶。