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forest and vegetation
相关语句
  森林植被
     Study on the evapotranspiration of forest and vegetation in dryland
     干旱缺水地区森林植被蒸散耗水研究
短句来源
     THE IMPACTS OF CLIMATE CHANGE ON FOREST AND VEGETATION ──METHODOLOGICAL STUDY BY GEO-INFORMATION SYSTEM
     气候变化对森林植被的可能影响──GIS支持下的方法研究
短句来源
     A Study on the Hillslope Hydrological Effect of Forest and Vegetation in the Diediegou Catchment, Liupanshan Mountains
     六盘山叠叠沟小流域森林植被坡面水文影响的研究
短句来源
     For precipitous terrain,very thin soil layer,many rainstorm in summer,and since end of the Qing Dynasty forest and vegetation to be destroyed,relative serious water and soil erosion had been brought about,its erosive modulus reached 2 500 t/(km 2·a) in the south mountainous district. All these limited the economic development so that it was a poor county.
     由于地形陡峭、土层很薄 ,夏季又多暴雨 ,再加上清朝末年以来森林植被遭到破坏 ,因此造成比较严重的水土流失 ,南部山区年侵蚀模数曾为 2 5 0 0 t/km2 ,制约了经济发展 ,长期属于贫困县。
短句来源
     2. based on the above regional factors, there are four of small-scale significantly to the formation of debris flow, those are unstable hillsiope, small-scale hydrolgy and climate, morphology of basin, and forest and vegetation.
     不稳定斜坡因子、小尺度水文气象因子、流域形态因子、森林植被因子等,在大尺度因素的基础上,对泥石流的形成有重要影响;
短句来源
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  “forest and vegetation”译为未确定词的双语例句
     The results will provide scientific steering function to the choice of species and site disposition in closing land for forest and vegetation reconstruction in the loess hilly region in semi-arid area.
     研究结果将对我国半干旱黄土丘陵区退耕还林和植被重建中合理的树种选择及其立地配置等提供科学的指导作用。
短句来源
     The sequence of sum total index in all items is:capital construction>mining >reclaiming wasteland with steepslope>brickkiln>destroying forest and vegetation.
     各因素造成危害的名次总和指数顺序为:基建工程>采矿>陡坡开荒>砖瓦窑>毁林毁草。
短句来源
  相似匹配句对
     forest .
     林。
短句来源
     The Forest Sports
     森林里的运动会
短句来源
     Forest and Agriculture
     森林与农业
短句来源
     Forest and Health
     森林与健康
短句来源
     Scenic Vegetation
     风景植被
短句来源
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  forest and vegetation
The collection of accurate and timely information on land use, crops, forest and vegetation are increasingly based on remote sensing spectral measurements produced by satellites.
      
At harvest, species diversity was 55% lower than in adjacent forest and vegetation.
      
Rainfed upland, hydromorphic, and lowland rice fields were examined during the 1996 growing season and compared to nematode communities in adjacent undisturbed forest and vegetation.
      
The study region included all the forest and vegetation within the present Pureora Forest Park.
      


In this paper, authors described the types, the causes and the features of soil and water loss on the Han and Jialing River water- sheds in the southern Shaanxi and analysed the relationship betwe- en the soil and water loss and the "81·8" flood damage in this area on the basis of the data collected through field survey after the "81·8" flood damage. The irrational land use and the destruction of forest and vegetation cover by people led to soil and water loss getting worse day by day in the hilly regions...

In this paper, authors described the types, the causes and the features of soil and water loss on the Han and Jialing River water- sheds in the southern Shaanxi and analysed the relationship betwe- en the soil and water loss and the "81·8" flood damage in this area on the basis of the data collected through field survey after the "81·8" flood damage. The irrational land use and the destruction of forest and vegetation cover by people led to soil and water loss getting worse day by day in the hilly regions in this area,and were also important reasons of intension of the "81·8", flood damage. Making the soil and water conservation well and promoting the forestation in this region are basic policies to control sediment deli- vered into streams or rivers and reduce the river flood damage. This is a key to keep ecological balance and make full use of the potentiality of the agricultural and natural resources.This research has a great purport to the realignment of land and the rational exploi- tation and use of the agricultural resources in the hilly regions of the southern Shaanxi.

本文介绍了陕西南部汉江、嘉陵江流域土壤侵蚀类型、原因与特点,分析了该区土壤侵蚀与“81·8”洪灾的关系。由于人们长期不合理的利用土地,森林植被屡遭破坏,不仅导致境内低山丘陵区水土流失日益严重,同时也加剧了江河沿岸的洪水灾害。搞好山区的水土保持,振兴林业,是控制河流泥沙,降低河床淤塞,防止洪水泛滥的根本大计,是维持生态平衡,充分发挥农业自然资源生产潜力的战略措施。

The hilly region of the Sichuan Basin lies in the middle part of the Basin,between 28°50′-31°40′N and 104°10′-107°00′E,having an area of 86,800km2 and population of 51 million.This region is characterized by dense population,a lack of lands,poor resources",low economic development level,serious soil and water losses,and lower cover rate of forest. It is necessary to build protection forest system with economic,ecologic and social benefits.A objective of building protection forest system is to establish a complex...

The hilly region of the Sichuan Basin lies in the middle part of the Basin,between 28°50′-31°40′N and 104°10′-107°00′E,having an area of 86,800km2 and population of 51 million.This region is characterized by dense population,a lack of lands,poor resources",low economic development level,serious soil and water losses,and lower cover rate of forest. It is necessary to build protection forest system with economic,ecologic and social benefits.A objective of building protection forest system is to establish a complex ecologic system with a good circulation, which can promote unfit relationship between population ,resource,economy and environment to tend towards harmoniousness through making artifical forest system with characteristics of multifuntion, multicomponent and rational distribution and structure: Principles of building this system are as follows;symbiosis,rationalization of distribution and structure,fully utilization land resource and the best integrated benefits.A basic pattern of the protection forest system in the region would be an assemble system of artificial forests which consist of various forests (high forest, shrubbew, bamboo forest etc.) distributed throughout the region dispersively and taken on spot,island and belt forms. This assemble system and the ecologic system of cultivated land would intersect and affect each other as an organic entity of agro-forest.In order to obtain mentioned objective, following measures must be implemented; 1. suit measures to local conditions,scientific distribution for forest system) 2. protection and manage-ment for the present forest and vegetation; 3. to close hillsides to facilitable afforestation ; 4. to develop construction of "Ecologic Household" and seriously implement forest policy.

四川盆地丘陵区,人多地少,资源贫乏,经济不发达,生态环境质量低劣,因而建设具有生态效益、经济效益和社会效益的防护林体系很有必要。建设本区防护林体系的原则应是:共生,布局与结构合理,土地资源充分利用和总体最优。经采取切实有效的措施后,最终建成一个良性农田生态防护林网络体系,以协调当地人口、资源、经济和环境之间的关系,并使其日臻完善。

China is a country that two thirds of its land covers by mountains. Affected by the Pacific and Indian monsoon, and western mountain glaciers, debris flows have damaged much to the development and construction of mountain regions. Recognizing the formational environments of debris flow is significant to mitigate the disasters. It is well know that three conditions are contributed to initiate debris flow, which'are enough debris material, steep relief and plentiful water. Based on the distribution of debris flow...

China is a country that two thirds of its land covers by mountains. Affected by the Pacific and Indian monsoon, and western mountain glaciers, debris flows have damaged much to the development and construction of mountain regions. Recognizing the formational environments of debris flow is significant to mitigate the disasters. It is well know that three conditions are contributed to initiate debris flow, which'are enough debris material, steep relief and plentiful water. Based on the distribution of debris flow in China, the authors discussed the formational factors according to the natural environments of varies scales and human activies. Several conclusions are obtained as follows: 1. the essential causes to the formation of debris flow in China are the regional geological background, large scale geomorphol ogica and climatic factor, all those control the regional distribution of debris flow; 2. based on the above regional factors, there are four of small-scale significantly to the formation of debris flow, those are unstable hillsiope, small-scale hydrolgy and climate, morphology of basin, and forest and vegetation. 3. irrational human activities in history and much more within the'recent scores of years, have been accelerating the debris flow. 4. the debris flow is a processes of interaction of many factors, the effect may be positive or negative, long-term or short-term, reversible or irreversible; 5. there are three characteristics of the activity of debris flow: openness, interaction of internal and external geological forces, and complexity geodogical of nature and human activities.

丰富的松散固体物质、充沛的水源和陡峻的地形,作为泥石流形成的三个基本条件,已得到学者们的认同。就本质而言,这三者可归纳为能量和物质两大因素。本文从中国泥石流区域分布着眼,从不同尺度的自然环境因素和人为活动,探讨中国泥石流形成发展的基本规律。研究结果表明,大尺度的区域地质背景、大地貌单元和犬气候系统是控制泥石流形成发育的主导因素;不稳定斜坡因子、小尺度水文气象因子、流域形态因子、森林植被因子等,在大尺度因素的基础上,对泥石流的形成有重要影响;历史上,特别是近期人类经济活动对环境的不良影响,加剧了泥石流的发展。泥石流灾害非单一因子所致,而是诸多因子综合作用的结果,是山地环境退化的产物。泥石流活动具有开放性、内外营力作用的共同性以及自然因素和人为因素的复合性这三大特点。

 
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