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美国英语听力80篇1 Lesson15

时间:2011-03-25 05:45来源:互联网 提供网友:ri386278   字体: [ ]
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[00:05.12]Cassava is an important food in the diets of more than 500,000,000 people in Africa, Asia and South America.
[00:15.70]However, the United Nations Food and Agriculture Organization notes that agricultural development policies
[00:24.53]often forget the importance of cassava.
[00:27.85]FAO officials organized a conference to prepare a plan of action to demonstrate1 the value of this food crop.
[00:38.03]Agricultural experts met late last month in Rome, Italy.
[00:43.60]Thousands of years ago, people in South America grew cassava as a food crop.
[00:50.99]Portuguese explorers took the plant to Africa during the Sixteenth Century.
[00:57.81]Today, it is one of the most important crops in Africa.
[01:02.90]FAO officials say more than 116,000,000 tons of cassava were grown worldwide last year.
[01:12.72]They expect production to rise to almost 210,000,000 tons in five years.
[01:20.30]Cassava is a root plant.
[01:22.96]It can live without water better than other root or cereal2 crops.
[01:28.45]It is the most productive3 crop in poor soils.
[01:32.50]Cassava requires little fertilizer4 or other chemicals.
[01:37.20](And) it needs the least labor5 to grow.
[01:41.17]Farmers can harvest cassava anytime from eight to twenty-four months after planting.
[01:48.28]The crops can be left in the ground as a safeguard6 against unexpected7 food shortages8.
[01:56.82]Cassava can be grown in many different environments.
[02:00.76]Farmers grow it on sandy soil in coastal9 areas where there is a lot of rain.
[02:07.74]They also grow it in dry areas 1,000 meters above sea level.
[02:14.32]People can eat both the leaves and the root of cassava.
[02:20.49]But the root is the main product.
[02:23.41]Most people cut (the roots into) pieces and cook them over an open fire.
[02:29.13]The plant also can be made into other food products.
[02:34.02]Cassava leaves contain a lot of vitamins, protein and minerals.
[02:40.76]However, many kinds of cassava contain high levels of a poisonous substance that must be removed before the plant can be eaten.
[02:51.57]So cassava must be prepared very carefully to prevent poisoning those who eat it.
[02:58.08]FAO officials say the nation officials say the nation of Ghana has shown the importance of improving cassava production.
[03:06.04]The officials say Ghana was able to reduce hungermore more quickly than any country between 1980 and 1996.


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1 demonstrate VwWxp     
vt.论证,证明;示范;显示;vi.示威游行
参考例句:
  • Let me demonstrate to you how this machine works.我给你演示一下这台机器的运转情况。
  • How can I demonstrate to you that my story is true?我怎样才能向你证明我的话是真实的呢?
2 cereal Wrzz1     
n.谷类,五谷,禾谷
参考例句:
  • I have hot cereal every day for breakfast.我每天早餐吃热麦片粥。
  • Soybeans are handled differently from cereal grains.大豆的加工处理与谷类的加工处理不同。
3 productive nQxxT     
adj.能生产的,有生产价值的,多产的
参考例句:
  • We had a productive meeting that solved some problems.我们开了一个富有成效的会议,解决了一些问题。
  • Science and technology are part of the productive forces.科学技术是生产力。
4 fertilizer Qkfx8     
n.肥料,化肥
参考例句:
  • Fertilizer enriches the soil.肥料使土壤肥沃。
  • Get some more fertilizer for the garden.给花园再多施些肥料。
5 labor P9Tzs     
n.劳动,努力,工作,劳工;分娩;vi.劳动,努力,苦干;vt.详细分析;麻烦
参考例句:
  • We are never late in satisfying him for his labor.我们从不延误付给他劳动报酬。
  • He was completely spent after two weeks of hard labor.艰苦劳动两周后,他已经疲惫不堪了。
6 safeguard qYExi     
vt.保护,维护;n.预防措施,保证条款
参考例句:
  • Keeping clean is a safeguard against disease.保持清洁是抵御疾病的防护措施。
  • We must safeguard forest timber.我们必须保护森林。
7 unexpected Qkpw8     
adj.想不到的,意外的
参考例句:
  • I always keep some good wine in for unexpected guests.我总保存些好酒,用来招待不速之客。
  • His promotion was unexpected.他的升迁出人意料。
8 shortages f09a7486187a5c082c18856f7aa1adb5     
n.不足( shortage的名词复数 );缺少;缺少量;不足额
参考例句:
  • Food shortages often occur in time of war. 在战争期间常常发生粮食短缺的情形。 来自《现代汉英综合大词典》
  • At the same time, worldwide food and fuel shortages eased. 同时,世界性粮食和石油短缺的现象终止了。 来自英汉非文学 - 政府文件
9 coastal WWiyh     
adj.海岸的,沿海的,沿岸的
参考例句:
  • The ocean waves are slowly eating away the coastal rocks.大海的波浪慢慢地侵蚀着岸边的岩石。
  • This country will fortify the coastal areas.该国将加强沿海地区的防御。
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TAG标签:   美国英语听力  Cassava
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