He kept a herd of cows, and also a bull.
他养了一群奶牛，还有一头公牛。
People buy shares of a cow or a herd of cows.
人们买一头牛的股份或者一群牛。
A herd of cows were grazing on the village common.
一群牛正在村中的公地上吃草。
The milkman selected the spotted cows, from among a herd of two hundred.
牛奶商从一群200头牛中选出有斑点的牛。
The milkman selected the spotted cows, from among a herd of two hundred.
牛奶商从一群200头牛中选出有斑点的牛。
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