Dad went out to milk the cows.
爸爸出去给牛挤奶去了。
Farm workers milked cows by hand.
农场工人们手工给奶牛挤奶。
他养了几头奶牛。
The cows are artificially inseminated.
这些母牛被人工授精。
There were cows grazing beside the river.
有些牛在河边吃草。
The cows are out now, grazing in the pasture.
牛群现在出去了，正在牧场上吃草。
Five cows graze serenely around a massive oak.
5头奶牛在一棵大橡树附近安静地吃草。
The gadget is used to artificially inseminate cows.
这件小装置用来给奶牛进行人工授精。
The feeding of dairy cows has undergone a revolution.
奶牛的喂食已经历了一场革命。
We picked the corn by hand and we fed it to the hogs and the cows.
我们掰下玉米，用来喂猪和奶牛。
The cows' rumps were marked with their owner's initials and a number.
这些奶牛的臀部上标有它们主人姓名的首字母和一个数字。
When his cows calve each year he keeps one or two calves for his family.
每年他的母牛产犊时，他都为家里留下一两头。
They said that the total number of cows dying from BSE would be twenty thousand.
他们说死于疯牛病的奶牛总数会有2万头。
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。
奶牛正在喝水。
是奶牛。我喜欢奶牛。
Where are cows? There are no cows.
奶牛在哪里？这里并没有奶牛。
我们给奶牛喂草吃。
奶牛为什么要挂铃铛？
我有十三头奶牛。
我有十二头牛。
你有两头母牛。
你喜欢奶牛吗？
我看到了许多奶牛。
There are chicks, ducks, pigs, dogs, and cows on his farm.
他的农场里有小鸡、鸭子、猪、狗和奶牛。
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。
Now, only 3 percent of families follow the agricultural model, but nearly all schools are scheduled as if our children went home early to milk the cows and took months off to work the crops.
现在，只有3%的家庭遵循农业模式，但几乎所有的学校都安排得好像我们的孩子要早早回家挤牛奶，或者花几个月的时间种田一样。
They have worked with cows since they were children.
他们从小就和牛打交道。
I heard the clank of buckets as the farm workers went to milk the cows.
我听到农场工人去挤牛奶时牛奶桶发出的当啷声。
Instead of cows, pigs, and horses, there is corn, beans, strawberries and tomatoes around his house.
他的房子周围没有牛、猪、马，而是玉米、豆子、草莓和西红柿。
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