Before silos were invented, cows gave less milk during winter because they had no green grass to eat.

筒仓发明之前，因为没有青草可以吃，奶牛在冬天产奶量减少。

《柯林斯英汉双解大词典》

Dad went out to milk the cows.

爸爸出去给牛挤奶去了。

《柯林斯英汉双解大词典》

Cows are not milk machines.

奶牛不是产奶机器。

youdao

The Swedish film "Cows Are Nice" looks at cow farmers trying to make a living in the milk industry.

VOA: special.2009.03.25

And in particular, dairy maids, whose responsibility was to milk cows, and so they had a very intimate relationship with cattle, often didn't get disease.

特别是挤奶女工,她们的工作就是挤奶,她们与奶牛有紧密的关系,通常不会得天花

耶鲁公开课 - 生物医学工程探索课程节选

Yogurt can be made with milk from cows or from other animals including goats, sheep, water buffalo and camels.

VOA: special.2009.01.19

In the meantime, the Food Standards Agency advice is that breast and cows milk are the best sources of nutrition for infants.

BBC: Concern over soya baby milk

"Human breast milk is designed to feed human infants and cows' milk is designed to feed baby cows, " says Professor Terence Stephenson, president of the Royal College of Paediatrics and Child Health.

BBC: Baby breast feeding

Dairy cows produce milk for 10 months after they give birth to their calves, and they must be milked every 12 hours.

FORBES: Why Milk Isn't As "Natural" As You Think