牛的复数

　　ad went out to milk the cows.

　　爸爸出去挤牛奶。

　　In the natural course of events cows would wish to be milked more than twice a day

　　按照事情发展的自然规律，母牛每天应该挤奶两次以上。

　　When his cows calve each year he keeps one or two calves for his family.

　　他的母牛每年产犊时，他都给自家留上一两头。

　　We picked the corn by hand and we fed it to the hogs and the cows

　　我们用手掰下玉米，把它喂给猪和牛吃。

　　Five cows graze serenely around a massive oak

　　5头奶牛在一棵大橡树旁悠闲自在地啃着青草。