牝牛的英文：
female cattle, heifer, cow

female是什么意思：
n. 女子，雌性动（植）物
adj. 女性的，温柔的，阴的

a female; a hen
雌禽

This one is a female, and these are the female's structures.
这一棵是雌性 而这些就是雌性植物的结构。

pipe bend with female thread
两头带阴螺纹的弯头

cattle是什么意思：
n. 牛；无价值的人；牲畜

Have you branded these cattle?
你给这些牛打上烙印了吗？

These are the branded cattles.
这些是有烙印的牲畜。

These cattle have brand on them.
这些牛身上打有烙印。

heifer是什么意思：
n. 小母牛

The white heifer is big with calf.
那头白色的小母牛快下崽了。

The ox-eyed goddess joined her husband, noticed the heifer, praised its beauty, and asked whose it was and of what herd
大眼女神走到丈夫身边，注目于那头小母牛，夸奖它的俊美，又问主人是谁，属于哪个牛群。

She brushed away the darkness and saw him on the banks of a glassy river with a beautiful heifer standing near
她拨开云层见到他正呆在一条明镜般的小河岸上，身旁有一头美丽的小母牛。