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美国小学英语教材5:第64课 小小美国伐木工(2)
These trees he fells toward each other, so that, if possible, their tops meet. 他让这些树彼此靠近，这样，如果可能的话，树的顶部就会相接。 When this is done, he has the backbone for his dam. 当这一切完成后，他就有
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美国小学英语教材5:第65课 小小美国伐木工(3)
When the dam is finished, the water spreads back, and there is a beautiful woodland lake. 水坝建好后，水就会回流，形成一个美丽的森林湖泊。 Many of the trees which were in the valley will now be standing in the water. 从前山谷
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美国小学英语教材5:第66课 小小美国伐木工(4)
These trees he cuts into logs about three feet long and floats them down to the dam, where he piles them up. 他把这些树砍成大约三英尺长的圆木，让圆木漂到水坝下面，堆积起来。 Then when the great freeze comes, most of th
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美国小学英语教材5:第67课 荒原:野生动物保护区(1)
WASTE LAND: A WILD-LIFE PRESERVE 荒原：野生动物保护区 Archibald Rutledge 作者：阿奇博尔德拉特利奇 Once upon a time there were thousands of beautifulbirds called passenger pigeons. Now they are gone.Herds of graceful antelope use
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美国小学英语教材5:第68课 荒原:野生动物保护区(2)
There is a valley in southern Pennsylvania which shows that whatever man gives up wild life takes. 宾夕法尼亚州南部的一个山谷表明，无论人们放弃什么野生动物，都要付出代价。 In this valley, some eighteen miles long a
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美国小学英语教材5:第69课 荒原:野生动物保护区(3)
All that wild life seems to want is a bare chance. 野生动物想要的一切不过是一个微茫的机会。 They cannot occupy and increase in the face of rifles, traps, and shotguns; neither could man. 面对步枪、陷阱和猎枪，他们不能
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美国小学英语教材5:第70课 荒原:野生动物保护区(4)
Three things have done it, the owner of the place said. 这种景象由三种因素造成,土地所有者表示。 These fields, you see, were worthless to me for planting purposes. 你看，如果是为了种植，这些土地是没有价值的。 B
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美国小学英语教材5:第71课 荒原:野生动物保护区(5)
The setting aside of lands where wild life is protected always has the same effect; that is, the immediate increase in wild life. 划定保护野生动物的土地，往往具有同样的效果;也就是说，野生动物的数量迅速增加。 But
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美国小学英语教材5:第72课 邓肯的鸟房客(1)
DUNCAN'S BIRD TENANTS 邓肯的鸟房客 Ernest Harold Baynes 作者：欧内斯特哈罗德贝恩斯 Mr. Rutledge told you that birds and animals will come to live with us if we give them a home. 拉特里奇先生告诉你，如果我们给鸟儿和动
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美国小学英语教材5:第73课 邓肯的鸟房客(2)
His father gladly agreed to help him and suggested that they build a house 父亲很高兴地答应帮助他，并建议他们建造一座房子， suitable for both bluebirds and tree swallows, and for purple martins, too, if they wished to come, 既适
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美国小学英语教材5:第74课 邓肯的鸟房客(3)
During the next few days Duncan noticed that the swallows were very busy. 在接下来的几天里，邓肯注意到燕子们非常忙碌。 Much of their time was spent in looking over their new home, 他们的大部分时间都花在看他们的新家
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美国小学英语教材5:第75课 邓肯的鸟房客(4)
Five white eggs had been laid when a flock of English sparrows arrived. 当一群英国麻雀到来时，燕子已经下了五个白蛋。 One tree swallow was in the nest and the other on guard outside. 一只树燕子在窝里，另一只在外面站
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美国小学英语教材5:第76课 邓肯的鸟房客(6)
About a fortnight later the youngsters began to show their heads and their speckled breasts at the doorway, and presently they attempted to fly to the roof. 大约两个星期以后，蓝鸟宝宝们开始在门口露出头和有斑点的胸部，不久
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美国小学英语教材5:第77课 邓肯的鸟房客(7)
At last, on the first of May, a bright warm morning, he leaped from his bed at the sound of strange, sweet bird voices outside. 最后，在五月一日，一个阳光明媚、温暖宜人的早晨，听到外面鸟儿奇怪而甜美的叫声，他从床
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美国小学英语教材5:第78课 棕鸫
THE BROWN THRUSH 棕鸫 Lucy Larcom 作者：露西拉科姆 Theres a merry brown thrush sitting up in a tree 树上有一只美丽的棕鸫 Hes singing to me! hes singing to me! 他在对我放歌！他在对我放歌！ And what does he say, little
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