奶牛

例句：

1. 1.The farmer milks his cow every morning.
   农民每天早上挤牛奶。
2. 2. She enjoys watching her cows graze in the pasture.
   她喜欢看着她的奶牛在草场上吃草。
3. 3.The cows are used for milking and meat production.
   奶牛用于挤奶和肉制品生产。