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nail milk swallow lie useful cud plow animal toe chew hoof really Mary
I
“What animal is most useful to us?” asked Mr. White.
Some of the children said that the horse is most useful. He pulls the wagon and the plow. He does much work for us, and we like to ride him.
COW’S HOOF
“But I think the cow is most useful,” said Mary; “she gives us milk to drink. Butter and cheese are made from milk.”
“Yes,” said Henry, “and after the cow is killed, she is useful to us. She is good for food.”
“That is true,” said Mr. White. “As the cow does so much for us, I am sure you will like to know more about her.”
II
“If you look at her foot, you will see that the hoof is in two pieces. It is really two hoofs, which are the strong nails of the cow’s toes. The hoof of the horse is in one piece.
“If you watch a cow eat, you will see that she does not bite the grass. She breaks it off and swallows it without chewing it.
HORSE’S HOOF
“When she has had as much as she wants, she lies down. Then the grass comes back to her mouth, a little at a time. She chews it well with her back teeth. Then she swallows it again.
“This is called chewing the cud. Is it not a queer way to eat? The cow is not the only animal which does this.”
“Oh, yes,” said Henry. “I think my goat chews the cud, too.”
“So he does,” said Mr. White, “and so do sheep as well as goats.”
一
“对我们来说什么动物最有用？”怀特先生问。
有的孩子说是马，因为他们可以拉车、犁地，为我们做很多工作，而且我们也很喜欢骑马。
“我觉得牛最有用，”玛丽说，“他们为我们提供牛奶。黄油和奶酪也是牛奶做的。”
“是啊，”亨利说，“牛死了以后也很有用，是美味的食物。”
“确实如此，”怀特先生说，“牛为我们做了很多贡献。你们一定想多了解一下他们。”
二
“如果你仔细观察牛脚，就会发现他们的蹄子分成两个部分。实际上，那是两个蹄子，上面有非常坚硬的指甲。马蹄则只有一个。”
“你们可能会发现，牛吃草的时候并不会咀嚼，只是把草扯下来，囫囵吞下去。”
“等他们吃够了，就会躺下来。这时青草会回到口中，一次只有一点点。他们会用后牙槽好好咀嚼一番，然后再次吞下。”
“这被称作反刍。是不是一种奇怪的进食方式呢？不过牛并不是唯一这么做的动物。”
“是啊，”亨利说，“我觉得我的小羊也反刍。”
“是这样的。”怀特先生说，“绵羊和山羊都会反刍。”
use use ful wonder wonder ful
1. Tell some things that the cow does for us.
2. Tell what the sheep does for us.
3. Name other animals that are useful to us.