Moo,moo! What am I? I have a patchy coat and a swishy tail. I can make delicious creamy milk. I am a...... cow. Moo,moo!
对于小童们来说，对于奶牛就是一个认知， 可以给一张图，或是视频，更好的去牧场或是养奶牛的农户家，指着奶牛 there is a cow what does a cow say?It says moo~~~~ It can make milk,do you like drinking milk? 等等等等......
When a cow eats, she tears the grass off
with her tongue and teeth.
She swallows her food quickly.
She does not chew it well.
The food is stored in the first or second of her four stomachs.
That's right! A cow has four stomachs.
Later, when a cow has finished eating,
she lies quietly and chews her food again.
She brings up bits of unchewed food or cud from her stomach.
She chews her cud properly, a little at a time.
It looks as if she is chewing gum.
Then she swallows it again.
A cow begins to make milk when she has a calf.
The milk is food for the newborn calf.
A cow has milk even after her calf needs it.
这里的calf当然就是小牛的意思了。
once the calf starts eating grass ,the cow's milk can become food for us,所以说奶牛产的奶是先喂小牛，继而才供给给人们。
接下来就要说挤奶了 挤奶用的动词自然是squeeze,比如挤牙膏就是用squeeze
挤奶的过程我是亲眼看过的，只不过当时使用一种挤奶的机器，而不是用手，乐趣少多了 Milk is made and stored in the cow's udder（牛的乳房）.
The udder is a bag with four teats（乳头）.
By milking time the udder is full.
When a teat is squeezed, milk flows out.
The farmer washes the cow's teats.（先清洗一下的哦）
Then he squeezes them. （未完待续）
