Similar to horses, cows are also called by different words. A baby cow is a calf. A male cow is not actually a cow; he is a bull. A female cow is just a cow, although if she is young she can be called a heifer.
馬と同じように、牛の単語もたくさんありますよ。牛の赤ちゃんは「calf」です。雄の牛は「cow」ではなく「bull」です。雌の牛は通常「cow」ですが、若い雌の牛なら「heifer」です。
