|
|
|
|  | | 为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。 | |
|
|

| | Desertification is one of the most serious environmental threat facing mankind more than one hundred of countries in the world and about 35% of earth' s land area are affected by desertification every year about 5 - 7 million hectares of land are lost to desertificationand causes annual losses of about US Dollar 26,000 million in the world. | | 沙漠化是当前世界上一个重要的环境问题。全球约有35%的陆地受到沙漠化的影响,每年因沙漠化而丧失的土地有5—7万km~2。我国也是受沙漠化严重危害的圉家之一,约有400万公顷旱作农田,500万公顷草场和一些重要的工业基地受到沙漠化威胁和危害。 中国科学院沙漠研究所以“立足国内,面向世界”为宗旨,十多年来,结合我国农业区划、国土整治、环境保护对沙漠化进行系统深入地研究,并建立九个试验基地进行沙漠化土地综合整治和合理开发利用示范性研究,取得了良好的社会、生态和经济效益。先后获国家科技进步特等奖,二等奖和省、部委的奖励17项。 中国科学院沙漠研究所受联合国环境规划暑、亚太经社会、非洲经社会委托曾多次举办国际沙漠化治理讲习班。也曾多次派遣科学家出访第三世界受沙漠化灾害严重的国家进行考察研究和讲学,并提出了沙漠化整治的建议,1988年完成“马里建立绿色屏障可行性考察”等。1988年8月联合国环境规划署为表彰该所在世界沙漠化研究和培训工作上作出的贡献,被授于“世界环境先进单位”称号。 1987年,联合国环境规划署,中国科学院、国家环境保护局共同签署的“谅解备忘录”决定在我国以... | | 文摘来源 | | Fengning is a typically severely-developed desertified region in the interlaced farming-grazing zone of northern China and has been listed as a comprehensive rehabilitation experiment and demonstrative plot.This paper analysed the constraint factors for the desertification rehabilitation and put forward the planning and design princi ples for the rehabilitation experiment and demonstration of desertified land as well as the rehabilitation ways.The priority was placed in the rehabilitation techniques of d... | | 分析了我国北方农牧交错带沙漠化强烈发展类型丰宁试验示范区的沙漠化土地综合整治制约因子、沙漠化土地的整治途径,并论述了试区沙漠化土地整治规划设计原则,总体布局和各类沙漠化土地整治的技术问题。 | | 文摘来源 | | Facing the 21st century, the desertification land′s synthetic renovate and constructive expoitage will be one of the human′s main task. In this thesis, systematically expounded the theoretical problems of the desertification land′s landscape ecological construction and of the regional sustainable development, at the aspsct of the applied theory. | | 面向21世纪的人类的重要任务之一是荒漠化土地的综合整治与建设性开发,本文在应用理论层面上系统地阐述了荒漠化土地的景观生态建设与区域可持续发展的理论问题 | | 文摘来源 | |   | | << 更多相关文摘 |
|
相关查询: | |
对查询结果不满意
|
|
|
|