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森林变迁
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  forest change
     Impact analysis of historical forest change on Yongding River
     历史上森林变迁对永定河的影响
短句来源
     Study on drive factor of forest change in the Qilian Mountain from the Qing Dynasty to the Minguo period
     清至民国祁连山区森林变迁驱动因素研究
短句来源
     The Study of the Forest Change in the Qilian Mountain During the Qing Dynasty and the Minguo Period
     清至民国祁连山区森林变迁研究
短句来源
     Sudies on the historical forest change in Yongding River Basin have found that Liaojin Dynasty is the turning point.
     研究历史上永定河流域森林变迁情况,发现辽金时代是一个转折点。
短句来源
  the forest changes
     THE FOREST CHANGES IN HAINAN PROVINCE AND THE SOUTH OF GUANGDONG PROVINCE AND GUANG XI PROVINC E INCHINAE
     两广南部及海南的森林变迁
短句来源
     This paper studied Japan's forest utilization and deforestation history and consequences resulted from forest exploitation in the past by looking through Japanese forest culture, the forest changes and forestry development in the history, as well as Japanese forestry administration during different periods of times.
     本文从探索日本森林文化、日本森林变迁和林业发展历程、日本林政发展过程等几个方面入手,得出日本古代森林资源利用与破坏情况,以及森林掠夺性采伐利用带来的后果,进而归纳出日本森林资源延续至今的历史原因。 通过研究,本文得出如下结论:
短句来源
     This paper discusses the forest changes in Hainan province and the south of Guangdong province and Guangxi province in China, probeses into thier courses and puts forward the view of renewing them.
     本文通过大量的历史文献记载,从气候、森林、动物、人口、垦殖及特有的“瘴气”现象变化等多方面,论述了历史时期地处我国最南部的两广南部与海南等地区的森林变迁,探讨了造成森林兴衰的多次反复的原因,并对恢复生态环境提出自己的意见。
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  “森林变迁”译为未确定词的双语例句
     FORESTS CHANGE GRADUALLY AND PRESENT CONSTRUCTION OF FOREST ON THE LOSS PLATEAU ON NORTHERA PART IN SHAANXI PROVINCE
     陕北黄土高原森林变迁与当前林业建设
短句来源
     Forest, Evapotranspiration, Climate and Desert: Effects on Desertification since the Change of Forests in China
     森林·蒸散·气候·沙漠——试论中国森林变迁对沙漠演替的影响
短句来源
     This article is about the inveotigation of the vicissitude and ecological benefit of the forest and the frequencies of natural drought and flood on the southern side along the Taihang Mountain dluring 2200 years(B.C.206-A.C.1985).
     本文系统的研究了太行山南端2200年(公元前206年前-1985年)森林变迁、森林生态效益和旱、涝自然灾害频数后,划分为七个时期。
短句来源
     The paper Reviews the advances about researches and operations of forest and grass in Gansu province from the aspects of forest vicissitude of historical time,forest and climate,favourable planting climatic region of economical fruit,grass land and climate,application of satellite remote sensing technique and antifire service of forest. It provides reference for big evolution in Northwest china.
     从历史时期森林变迁、林业与气候、经济林果适宜种植区、草场与气候、卫星遥感技术应用和森林防火服务方面综述了甘肃省关于林草科学研究和业务的进展 ,可供西北大开发参考
短句来源
     Based on historical documents,modern survey and statistics,as well as the result of predecessor studies,the trend and main process of forest dynamics are recognized. The forest area and forest coverage rates for each province of China from 1700 to 1949 are estimated backward by every 50 years. Linking the result with modern National Forest Inventory data,the spatial-temporal dynamics of Chinese forest in recent 300 years(A.D.1700-1998) is quantitatively analyzed.
     以清代以来史料为依据,在现代清查统计资料和前人研究成果的基础上,通过对森林变迁大体趋势及主要过程的客观把握,重新校订了1949年和1700年前人的估算数据,回溯估算了1750~1900年中国各省区每50年森林面积与森林覆被率值,并与现代森林清查资料衔接,分析1700~1998年近300年来中国森林变迁的时空特征。
短句来源
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  forest change
Death of trees (>amp;gt;4.5 cm dbh) and saplings (1.4 m tall-4.5 cm dbh) was monitored over 5 years in a Southern Mixed Hardwood Forest to determine causes of death, death rates, and to assess the nature and direction of forest change.
      
Detecting Long-term Global Forest Change Using Continuous Fields of Tree-Cover Maps from 8-km Advanced Very High Resolution Radi
      
Some evidence suggests that the rate of tropical forest change in the last several thousand years may have been high.
      
If so, then CO2 increases and the likely alterations in temperature, forest turnover rate, rainfall, or severe droughts may drive substantial future forest change.
      
Optimal Foraging, Institutions and Forest Change: A Case from Nepal
      
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  change of forest
The relationship between the change of forest resources and climatic factor in the, "Three-North" region of China were studied in this paper.
      
Using total area, mean patch size, patch density, coefficient of patch size variation, mean patch fractal dimension and mean shape index, we studied the change of forest landscape pattern and the change of each patch types in this region.
      
Successional change of forest pattern along topographical gradients in warm-temperate mixed forests in Mt Kiyosumi, central Japa
      
However, an important change of forest management objective, such as the end of all timber harvest on National Forests in the Pacific Northwest or complete elimination of mature timber in the St.
      
A geographically extended model of the dynamics of tree size structure of forests is proposed to simulate the change of forest zonation along latitude in response to global environmental change.
      
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  the forest changes
The driest area was only 20 cm higher in elevation than the wettest area, but the structure of the forest changes greatly over this range.
      
At that point, something else becomes limiting, and the basic biogeochemical nature of the forest changes.
      
Totally, we will have 16 different cases for the forest changes, that the map below shows the forest canopy density changes at the two dates.
      


The parrots of China were recorded very early in many Chinese historical books. During the historical period, their distributional areas changed largely. Long before the reign of Emperor Dao Guang, in the Qing Dynasty, there were no parrots in the western parts of the Loess plateau, such as Lanzhsu, Lupaushan or Longshan district, whereas many were found there formerly. In the Yangtze Ualley, from north-east Yunnan, south. west Guizhou and Cheugdu district, to south Anhui and east Zhejiang, where parrots survived...

The parrots of China were recorded very early in many Chinese historical books. During the historical period, their distributional areas changed largely. Long before the reign of Emperor Dao Guang, in the Qing Dynasty, there were no parrots in the western parts of the Loess plateau, such as Lanzhsu, Lupaushan or Longshan district, whereas many were found there formerly. In the Yangtze Ualley, from north-east Yunnan, south. west Guizhou and Cheugdu district, to south Anhui and east Zhejiang, where parrots survived until the middle era of the Qing Dynasty, but now we can't find them any more. Even in South China, such as south Yunnan, their areas of distribution have been reduced substantially, and their number decreased. The changes of distribution range of the Chinese parrots, to a certain extent reflects the evolution of the tropical and subtropical forestry of China.

中国鹦鹉见于文献的记载很早,历史时期它的分布有很大的变化。在清道光以前,黄土高原西部兰州、六盘山、陇山一带的鹦鹉久已灭绝:长江流域从滇东北、黔西北、成都附近到安徽南部、浙江东部鹦鹉在清中叶以后,也已绝迹;就是华南、滇南的鹦鹉,在分布范围和数量上也有很大的缩小和减少。中国鹦鹉分布的变迁,在一定程度上反映着我国森林的变迁。

This article is about the inveotigation of the vicissitude and ecological benefit of the forest and the frequencies of natural drought and flood on the southern side along the Taihang Mountain dluring 2200 years(B.C.206-A.C.1985). They are divided into six periods, Before the Qin Dynasty(B.C.206), the forest vegetation was good, the forest covering rate was over 80 percent. the natural ecology was cireulating well. And there were no droughts and floods. Between western and Eastern Han for 426 years, the forest...

This article is about the inveotigation of the vicissitude and ecological benefit of the forest and the frequencies of natural drought and flood on the southern side along the Taihang Mountain dluring 2200 years(B.C.206-A.C.1985). They are divided into six periods, Before the Qin Dynasty(B.C.206), the forest vegetation was good, the forest covering rate was over 80 percent. the natural ecology was cireulating well. And there were no droughts and floods. Between western and Eastern Han for 426 years, the forest regetation. decreased. When the forest covering rate dropped to 70 percent, no hard drought and flood appeared, It happened once about 142 years From the Epoch of the three Kingdoms to the Tang Dynasty. the forest covering rate dropped to 50 percent, and serious drought and flood appeared After then, as the forest vegetation decreased continually, the naturol ecological circulation got worse and worse. Up to the period of the Republic of China, when the forest covering rete dropped to 5 percent, the frequuencies of drought and flood were partly 2.1 years and 1.4 years. The drought and flood were replaced frequently. The natural ecological circulation was even worse. Since liberation, the forest in the southern of Tai Hang mountain has been trended to developing. After the Third Plenary Session people took the great measures to make forest vegetation go on steadily and developing read.

本文系统的研究了太行山南端2200年(公元前206年前-1985年)森林变迁、森林生态效益和旱、涝自然灾害频数后,划分为七个时期。秦(公元前206年)前,森林植被完好,森林覆盖率在80%以上,自然生态良性循环,基本上没有旱涝灾害。至东、西汉426年间,森林植被减少,森林覆盖率下降至70%时,已出现了一般性旱涝灾害,均为142年一遇。三国至唐,森林覆盖率下降至50%,出现了特大干旱和特大水灾。此后,随着森林植被的继续减少,自然生态循环向着恶化方向日趋发展。至民国时期,森林覆盖率下降至5%时,旱,涝灾害频数分别为2.1年和1.4年一遇,灾害频繁,交替发生,生态循环极度恶化。建国以来,太行山南端境内的森林总的是发展趋势。党的三中全会以后,采取重大措施,森林植被走向稳步发展的道路。

A statement of the variations of forest from geological periods to historical periods of Zhejiang. The former is due to the variations of the ecological factors. The later is closely related to the existence and activities of human being.

历述浙江省从地史时期到历史时期森林的变迁情况。地史时期森林的变迁主要是由于生态环境的变动;历史时期森林的变迁与人类的存在及活动密切相关。

 
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