C 母牛 fully-grown female of any animal of the ox family, especially the domestic kind kept by farmers to produce milk and beef

　breed a ～　饲养奶牛
　buy a ～　买母牛〔奶牛〕
　kill a ～　杀死奶牛
　look after a ～　看护奶牛
　milk a ～　挤奶
　own a ～　拥有奶牛
　possess a ～　拥有奶牛
　raise a ～　饲养奶牛
　sell a ～　卖奶牛
　slaughter a ～　屠杀奶牛
　fat ～　肥胖的母牛〔奶牛〕
　healthy ～　健壮的母牛〔奶牛〕
　old ～　老母牛
　sacred ～　（印度的）圣牛，神圣不可侵犯的人〔物〕
　sick ～　有病的母牛
　young ～　小母牛
　～ boy　牛仔

　Of the pig and the cow, the latter is more valuable.　猪和牛相比，后者更有价值。
　The hunters compensated the farmer for killing his cow by paying him.　猎人们给了这位农民钱，以作为打死他的牛的赔偿。
　She is milking the cows.　她正给奶牛挤奶。
　Milk comes from cows or other animals.　奶是由奶牛或其他动物提供的。
　Our cow's carrying again.　我们的母牛又怀崽了。
　Two young cows followed their mother up like a shadow.　两头小母牛形影不离地跟着她们的妈妈。
　A herd of cows were grazing on the village common.　一群牛正在村中的公地上吃草。
　You stupid cow!　你这蠢女人。

 ♣ till the cows come home
　长时间，永远　for a very long time; forever
　You can talk till the cows come home, and you'll never make me change my mind.　你就是说得再久，也休想改变我的主意。
　She loves sewing and would quite happily make clothes.　她喜欢缝衣服，她非常高兴地做，没完没了。

 ♣ cow, ox
　这两个词都可表示“牛”。其区别是：cow指母牛，尤指供产奶的乳牛；ox是牛的通称，尤指公牛或阉过的公牛。例如：

　［词源］　古英语cu （母牛，奶牛）