他们饲养奶牛。

They farm dairy cattle.

他那170头奶牛和200头乳牛都在那块地上圈养。

His herd of 170 dairy cattle and 200 young stock are kept on the land.

奶牛的臀部标着一个数字。

The cows' rumps were marked with a number.

奶牛突然尥起了蹶子。

Suddenly the cow kicked up its hind legs.

5头奶牛在一棵大橡树旁悠闲自在地啃着青草。

Five cows graze serenely around a massive oak

成年奶牛有犄角。

A mature cow has horns.

他养了几头奶牛。

He kept a few dairy cows

筒仓发明前，因为没有青草可以吃，奶牛在冬天产奶量减少。

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

集约饲养把奶牛变成了生产牛奶的机器，每天差不多要挤出25升到40升的牛奶。

Factory farming has turned the cow into a milk machine, producing anything from 25 to 40 litres of milk per day

这些奶牛被放出去吃草。

The cows are put out to pasture.

每家至少有3头奶牛。

Each family possesses at least three milk cows.

奶牛产奶。

Cows yield milk.

奶牛没奶了；我们没有牛奶可卖。

We have no milk to sell; the cows have dried up.