100个句子记完1000个单词（10）

73. Starting around 7000 B.C., and for the next four thousand years, much of the Northern Hemisphere experienced temperatures warmer than at present.
    大约从【cóng】公【gōng】元前【qián】七千年【nián】开始，在四千【qiān】年当中，北半球的温度比现在高。
　　
74. When Henry Ford first sought financial backing for making cars, the very notion of farmers and clerks owning automobiles was considered ridiculous.
    当亨利.福特最初制造汽车为寻【xún】求资金支持时，农【nóng】民和一【yī】般职【zhí】员也能拥有【yǒu】汽车的想法【fǎ】被认为是【shì】可笑的。
　　
75. Though once quite large, the population of the bald eagle across North America has drastically declined in the past forty years.
    北美秃头鹰的【de】数量【liàng】一度很【hěn】多，但在近四十年【nián】中全北美的秃头【tóu】鹰数【shù】量急剧【jù】下降。
　　
76. The beaver chews down trees to get food and material with which to build its home.
    水獭啃【kěn】倒树木【mù】，以【yǐ】便取食物并获得造窝的材料【liào】。
　　
77. Poodles were once used as retrievers in duck hunting, but the American Kennel Club does not consider them sporting dogs because they are now primarily kept as pets.
    长卷毛【máo】狗【gǒu】曾被用作猎鸭时叼【diāo】回猎物的猎犬，但【dàn】是美国Kennel Club却【què】不承认它们为【wéi】猎犬，因为它们现在大多数作为【wéi】宠【chǒng】物饲养。
　　
78. As a result of what is now know in physics and chemistry, scientists have been able to make important discoveries in biology and medicine.
    物理【lǐ】学和化学【xué】的一【yī】个成果是使得科【kē】学家们能【néng】在生物学【xué】和医学上获得重大发现。
　　
79. The practice of making excellent films based on rather obscure novels has been going on so long in the United States as to constitute a tradition.
    根据默默无闻的【de】小【xiǎo】说制作优秀影片在美国【guó】由来已久，已经成【chéng】为传统。
　　
80. Since the consumer considers the best fruit to be that which is the most attractive, the grower must provide products that satisfy the discerning eye.
    因为顾客认【rèn】为【wéi】最好的【de】水【shuǐ】果应【yīng】该【gāi】看起来也是最漂亮的，所以【yǐ】种植者必须提供能满足挑剔眼光的产【chǎn】品。