1、英语翻议讲解：这里是VOA特别英语农业报道。农民，尤其是发展中国家的农民，经常因为砍伐树木而受到批评。但是一项新的调查显示，许多农民已经意识到保护树木的价值。研究人员利用卫星图片进行观察发现，在10亿多公顷的农田上，树木覆盖率至少为10%。这几乎占世界所有农田的一半。肯尼亚农地林业中心领导了这次调查。他们于上周在内罗毕举行的第二次世界农业林地会议上对调查结果做了报告。此前的评估远远低于实际数字，但是非常不全面。这项新的调查的作者称，现在可能仍然低估了全世界农田林木覆盖率。该研究发现，南美地区林木覆盖率最高，其次是撒哈拉以南非洲，随后是东南亚。北非和西亚地区林木覆盖率最低。该研究发现，仅仅利用气
2、候条件不能解释不同地区林木覆盖率的差异。而附近的人口数量也不能解释，也就是说，人和树木可以和谐共处。在有的地方，树木和人口都非常稀少，有的地方则人口和树木都很稠密。研究结果表明，土地所有权，市场或者政府政策都能够影响到树木的种植和保护。Dennis Garrity是世界农地林业中心的负责人。他说，农民们现在在自觉采取行动，保护和终止树木。问题是，政策制定者和计划着在认识和支持这些努力方面比较滞后。卫星图片可能显示不出农民种植树木的用途，但是能够看出，这些树木可以提供坚果，水果，木材和其他林产品。这些树木还可以防风，提供树荫。还可以防止土壤流失，保持蓄水。即使在干旱条件下，树木也通常可以提供食物
3、，并且可以提供资金来源，一直到下一个生长季。一位专家称，重要的是寻找到适合当地气候条件的合适的树种用于合理的用途。一些树种是天然的肥料。它们从空气中吸收氮素，将其固定到土壤中。农地林业中心的科学家称，使用肥料树木可以将对化学氮素的需求减少四分之三，还可以将产量提高到两到三倍。树木还可以吸收与气候变化有关的二氧化碳。Wangari Maathai是肯尼亚环境学家和诺贝尔和平奖得主。她说，这项研究表明，树木对于任何地方的农业生产都非常关键。1.incomplete a. 不完全的,不定的例句：But still the puzzle remained incomplete. 但是谜底还尚未揭开。
4、an imprecise or incomplete account. 不精确或不完全的解释。2.underestimate vt. 低估,看轻例句：He should not underestimate oneself. 他不应低估自己。 It was not that Bruce always underestimated difficulties. 这并不是说布鲁斯总是低估困难。3.windbreak n. 防风林,防风物例句：The woods along the coast provide a good windbreak. 沿海边的树木是很好的防风林。4.drought n. 干旱
5、,缺乏例句：Outbreaks of disease occurred in the wake of the drought. 那场旱灾过后疾病丛生。5.triple vi. 增至三倍6.capture vt. 抓取,获得,迷住例句：The novel captured the imagination of thousands of readers. 这部小说引起了千万读者的想象。7.critical a. 批评的,评论的;危急的,紧要的;临界的例句：We are at a critical time in our history. 我们正处于历史的紧要关头。1.Farmers, especi
6、ally in developing countries, are often criticized for cutting down forests. cut down 砍倒,减少例句：She cut down the sapling with one chop. 她一斧子就把树苗砍倒了. Weve already cut down our prices to cost level. 我们已经将价格降到成本费的水平了。cut up切碎例句：Im afraid youre under an obligation to cut up those logs. 恐怕您有义务把这些干柴劈成小块。我们高
7、中时因该学过这么一句:He cut the tree down and then cut it up.2.Earlier estimates were much lower but incomplete. much修饰比较级可修饰比较级的词 1)a bit, a little, rather, much, far, by far, many, a lot, lots, a great deal, any, still, even等2)还可以用表示倍数的词或度量名词作修饰语。3)以上词(除by far)外，必须置于比较级形容词或副词的前面。3.Next comes Africa south of
8、 the Sahara, followed by Southeast Asia. followed by sth,通常用来做状语，后面的sth是排在主语之后following sth，这里的sth在顺序上是在主语前面的。4.Scientists at the agroforestry center say the use of fertilizer trees can reduce the need for chemical nitrogen by up to three-fourths.can reduce the need by，需求减少多少，后面的数量是一个减少的范围。如果是reduce
9、 to，后面的数字是一个点，减少之后的数字。英语听力原文：This is the VOA Special English Agriculture Report.Farmers, especially in developing countries, are often criticized for cutting down forests. But a new study suggests that many farmers recognize the value in keeping trees.Researchers using satellite images found at leas
10、t ten percent tree cover on more than one billion hectares of farmland. That is almost half the farmland in the world.img used for farming can also support treesThe World Agroforestry Center in Kenya led the study. The findings were reported last week in Nairobi at the second World Congress of Agrof
11、orestry.Earlier estimates were much lower but incomplete. The authors of the new study say it may still underestimate the true extent worldwide.The study found the most tree cover in South America. Next comes Africa south of the Sahara, followed by Southeast Asia. North Africa and West Asia have the
12、 least.The study found that climate conditions alone could not explain the amount of tree cover in different areas. Nor could the size of nearby populations, meaning people and trees can live together.There are areas with few trees but also few people, and areas with many trees and many people. The
13、findings suggest that things like land rights, markets or government policies can influence tree planting and protection.Dennis Garrity heads the World Agroforestry Center. He says farmers are acting on their own to protect and plant trees. The problem, he says, is that policy makers and planners ha
14、ve been slow to recognize this and to support such efforts.The satellite images may not show what the farmers are using the trees for, but trees provide nuts, fruit, wood and other products. They provide windbreaks and shade from the sun. They also help prevent soil loss and protect water supplies.
15、Even under drought conditions, trees can often provide food and a way to earn money until the next growing season.The important thing, says one expert, is to find the right tree for the right place for the right use.Some trees act as natural fertilizers. They take nitrogen out of the air and put it
16、in the soil. Scientists at the agroforestry center say the use of fertilizer trees can reduce the need for chemical nitrogen by up to three-fourths. And they say it can double or triple crop production.Trees also capture carbon dioxide, a gas linked to climate change.Wangari Maathai is a Kenyan environmentalist and Nobel Peace Prize winner. She says the study shows that trees are critical to agricultural production everywhere.And thats the VOA Special English Agriculture Report, written by Jerilyn Watson. Im Jim Tedder.
