cattle 牛（复数）

male cattle =bull 公牛

female cattle= cow 母牛

three cattle三头牛

some cattle 一些牛

one cow /one bull 一头牛(不能用cattle)

beef : meat from a cow肉牛的肉。 牛肉

calf :a young cow ,小牛/牛犊

Each cow normally produces only one calf at a time

通常情况下，一只母牛一次产一只小牛

the newborn calf fears no tiger 初生牛犊不怕虎

ox: 干重活的a bull that has been castrated ：（阉割的）公牛

steer : a bull that has been castrated ：（阉割的）公牛

bull : the male animal in the cow family 公牛(通常未阉割的)

cow:母牛/奶牛/肉牛/菜牛

buffalo水牛.asian buffalo和african buffalo亚洲水牛和非洲水牛

cattle是集合名词，不能加不定冠词a，

用作主语时，句子的谓语动词多用复数。

a herd of cattle 一群牛

The cattle usually graze in the grass land.

牛通常在草地吃草.