公交车短裙挺进太深了h女友,国产亚洲精品久久777777,亚洲成色www久久网站夜月,日韩人妻无码精品一区二区三区

233??У- ????????????

????
您現在的位置:233網校 >> 英語四級考試 >> 聽力 >> 聽力模擬試題 >> 文章內容

2015年英語四級聽力《每日一聽》4.27

  聽音頻:​

  如不能正常播放,點擊此處下載聽力mp3>>

  Large governmental organizations controlled the production of seeds in Africa for many years. Owners of small farms had to buy their seeds from these agencies. But now there is an effort to make seeds from other suppliers available to African farmers. The new, improved seeds might someday help Africa feed itself.

  Edward Mabaya grew up in Zimbabwe. There were ten children in his family. His father was a construction worker. His mother farmed their land. He says the small farm was very successful because his mother used different kinds of seeds.

  He says it was a time when many new kinds of seeds were coming into Zimbabwe. He said some farmers began to use them and increased their crop production. Mr. Mabaya said his parents used the money earned from those crops to send all their children to school.

  Farmers purchasing seed from an agro-dealer outlet. (Photo credit: Market Matters Inc.)
  Mr. Mabaya is now a researcher at Cornell University in New York. He is working on a project that he hopes will give other small farmers the same chance his parents had.

  He leads The African Seed Access Index (TASAI), which researches Africa's seed industry. The organization was launched in March. It is a joint effort of Cornell University, a non-profit group called Market Matters, Inc. and the U.S. Department of Agriculture.

  TASAI hopes to provide improved seeds to owners of small farms. Mr. Mabaya says Africa's seed industry is complex and can be inefficient. He says TASAI will try to identify areas of the industry that can be improved.

  Some private seed developers are operating in Africa but not many. And they have not worked to develop new seeds. Most farmers in Africa use the same seeds they have been planting for many years, unlike farmers in the Western world. The seeds have not been improved to resist disease or tolerate drought.

  George Bigirwa works at the Alliance for a Green Revolution in Africa or AGRA. He says there are not enough improved seeds in Africa to supply the millions of farmers who need them.

  "I remember when before AGRA came in, in some countries like Burkina Faso, like Mali, even Ghana, there were no seed companies. At least today you have an average of about six to eight seed companies in place. However, looking at the amount of seed each company produces, that is still very little."

  He says improved seeds can help small farmers increase their production by six times.

  Mr. Mabaya says this difference can be enough to help farmers who are now growing just enough food to feed their families. He says instead they could grow crops to sell, as well. He says that could help them escape poverty.

  Mr. Mabaya says there is still much work to be done to fully develop Africa's seed industry. But he says if seed companies and farmers in Africa continue to use the same agricultural technology the rest of the world uses, Africa will someday be able to feed itself.

  I'm Marsha James.

  Hilary Heuler reported this story from Nairobi. Christopher Jones-Cruise wrote it for VOA Learning English. Caty Weaver was the editor.

  進入專題2015年聽力風暴來襲,英語四級每日一聽!  

  聽力練習:2015年6月英語四級聽力練習題(5套)

  聽力輔導英語四級備考筆記:聽力篇四級聽力題型攻略提分技巧

責編:YYT  評論  糾錯

課程免費試聽
?γ??????? ??? ???/???? ??????? ????
????????????????????????????????? ????? ??100 / ??100 ????
???????????????????????? ????? ??100 / ??100 ????
???????????????????????? ????? ??100 / ??100 ????
??????????????????д???? ????? ??100 / ??100 ????
主站蜘蛛池模板: 班戈县| 前郭尔| 汤原县| 武平县| 澄江县| 鞍山市| 秀山| 高碑店市| 汤阴县| 盐源县| 福贡县| 柞水县| 库车县| 潼关县| 阿勒泰市| 科技| 阿克| 武功县| 拉孜县| 习水县| 白玉县| 鹤山市| 海丰县| 绍兴县| 林口县| 深州市| 富民县| 防城港市| 罗源县| 土默特右旗| 义马市| 涪陵区| 古田县| 衡水市| 郑州市| 扎赉特旗| 高碑店市| 平舆县| 泾源县| 古田县| 贞丰县|