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glacier
相关语句
  冰川
    Investigation on Forest,Glacier and Water Resources in the Qilian Mountains
    祁连山森林、冰川和水资源现状调查研究
短句来源
    Glacier Masterpieces
    冰川杰作
短句来源
    Conservation and Application of Biological Resources in Hailuogou Glacier and Forest Park
    海螺沟冰川森林公园的生物资源及保护利用
短句来源
    Conservation and Utilization on Biological Resource of Hailuogou Glacier and Forest National Park
    海螺沟冰川森林公园区的生物资源及其保护利用
短句来源
    After the Glacier, this natural forest has become a zonal vegetation.
    到第四纪冰川以后,这种天然林已经成为地带性的植被类型。
短句来源
更多       
  冰川
    Investigation on Forest,Glacier and Water Resources in the Qilian Mountains
    祁连山森林、冰川和水资源现状调查研究
短句来源
    Glacier Masterpieces
    冰川杰作
短句来源
    Conservation and Application of Biological Resources in Hailuogou Glacier and Forest Park
    海螺沟冰川森林公园的生物资源及保护利用
短句来源
    Conservation and Utilization on Biological Resource of Hailuogou Glacier and Forest National Park
    海螺沟冰川森林公园区的生物资源及其保护利用
短句来源
    After the Glacier, this natural forest has become a zonal vegetation.
    到第四纪冰川以后,这种天然林已经成为地带性的植被类型。
短句来源
更多       
  “glacier”译为未确定词的双语例句
    The authors give a brief introduction about the source region, analyze the existing ecological problems such as glacier retreat, lake withdrawal, grassland degeneration, land desertation and biodiversity reduction.
    简要介绍了长江源区的基本概况 ,分析了源区目前存在冰川退缩、冻土退化、草场退化、土地沙化、湖泊萎缩、生物多样性遭受破坏等主要生态环境问题。 造成这种状况的有自然因素 ,也有人为因素 ,自然原因占主导地位 ,而人为因素加剧了生态环境的恶化。
短句来源
    The average genetic similarity within populations was 0 927,that among populations was 0.845.The relative low level of genetic diversity in Pinus koraiensis was largely connected with the serious attack during glacier of the Quaternary Period and the interference from human ativities.
    群体内平均遗传相似度为 0 .92 7,群体间为 0 .84 5。 红松现阶段相对偏低的遗传多样性水平与第四纪冰期所遭受的严重打击和人类近期的干扰有较大关系
短句来源
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  glacier
Microorganisms Found in the Basal Horizons of the Antarctic Glacier above Lake Vostok
      
Problems of such kind arise in glaciology when one estimates the stability of snow on mountain slopes or determines the catastrophic movement of a glacier; the results can also be applied to solifluction phenomena [2, 3].
      
It was assumed that the temperature at the bed of the glacier could reach the melting point due to nonstationary heating and that the conditions would be produced for motion of the glacier.
      
Here we examine the nonstationary response of a glacier to small deviations of the system parameters from critical values corresponding to the stationary state.
      
Numerical investigation and self-similar solutions of the glacier-ocean interaction problem
      
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The deciduous broad-leaved forest is a vegetation type in the Chinesevegetation classification system. In the vegetative regionlization, it is a zonal vegetation in the warm temperate deciduous broad-leaved forest region. From the Greaceous period, the forest in North China mainly consisted of deciduous trees and shrubs. Through different geologic periods' development and evolution, till the Tirtiary period, its vegetation type mainly belonged to the warm temperate deciduous broad-leaved forest. After the Glacier,...

The deciduous broad-leaved forest is a vegetation type in the Chinesevegetation classification system. In the vegetative regionlization, it is a zonal vegetation in the warm temperate deciduous broad-leaved forest region. From the Greaceous period, the forest in North China mainly consisted of deciduous trees and shrubs. Through different geologic periods' development and evolution, till the Tirtiary period, its vegetation type mainly belonged to the warm temperate deciduous broad-leaved forest. After the Glacier, this natural forest has become a zonal vegetation. The deciduous broad-leaved forest of China requires ecologically anannual average temperature of 8-10℃, and 500-1000mm's annual precipitation. The soilunderneath is mainly brown forest soil and drab soil. The constractive species of the community is some typical genera and species of the north temperate zone; its composition is mainly some characteristic components in East Asia, especially of China-Japan and Chinese endemic species, having certain relationship with Siberia, Middle Asia and the tropical flora in different directions.The deciduous broad-leaved forest of China is usually composed of tree layer, shurblayer and herb layer, lacking in surface bryophyte, with liana and periphyte rarely seen. According to the life habit and habitate requirement of the dominent species, it can bedivided into three types-the typical deciduous broad-leaved forest, the mountain popularand birch forest and the riparian deciduous broad-leaved forest.From 5000~ 4000 B. C., with the settlemellt of the human being, many primary forests are transformed to cultivated agricultural vegetation. As artificial interference increased, the deciduoous broad-leaved forest evolved to shrubs and grassy thicketin regressive succession. Only when the environment improves, can it evolve to the typical deciduous broad-leaved forest. So it is considered unsuitible to sort out a vegetation type as the evergreen mixeddeciduous broad-leaved forest when evergreen broad-leaved trees is in the deciduous broad-leaved forest. If such a type should be established, then it coule be classified under a subunit of vegetation type.

落叶阔叶林为中国植被分类系统中的一个植被型,在植被分区中是暖温带落叶阔叶林区域的地带性植被。从白垩纪开始,中国华北的森林组成以落叶的乔木和灌木为主。经过不同地质时期的发展和演变,到第三纪时,植被类型主要属于暖温带落叶阔叶林。到第四纪冰川以后,这种天然林已经成为地带性的植被类型。中国落叶阔叶林的生态要求是年平均温度一般为8-10℃,年降水量在500-1000mm之间。林下发育的土壤主要是棕色森林土和褐色土。群落的建群种是一些典型北温带的属种,其组成主要是东亚特别是中国-日本和中国特有的各种成分,在不同方向与西伯利亚、中亚和热带植物区系均有一定的联系。中国落叶阔叶林通常由乔木层、灌木层和草本层构成,林下缺少地表苔藓层,很少见有藤本植物和附生植物。根据优势种的生活习性和所要求的生境条件,可以划分为典型落叶阔叶林、山地杨桦林和河岸落叶阔叶林三类。从公元前四、五千年起,随着人类的定居而出现了农业生产,改造许多原始的森林为栽培的农业植被。由于人为干扰的加强,落叶阔叶林往往逆行演替为灌丛和灌草丛。只有环境条件改善以后,才能沿着进展演替成为典型落叶阔叶林。在落叶阔叶林中混生有常绿阔叶树而被称为常绿、落叶阔叶混交林的植被型,?

he mixed broadleaf evergreen and deciduous forest is a transitional type from the deciduous broadleaf forest to the evergreen broadleaf forest, and it is one of the zonal vegetations. It can be found occasionally at the elevations of 700 ̄ 1 000m in Lushan mountain and is affected strongly by human activities. There are 72 families, 139 genus and 214 species of vascular plants in the forest in Lushan mountain. From the areal-types of families and genera of the carpophytes, the temperate components are the most...

he mixed broadleaf evergreen and deciduous forest is a transitional type from the deciduous broadleaf forest to the evergreen broadleaf forest, and it is one of the zonal vegetations. It can be found occasionally at the elevations of 700 ̄ 1 000m in Lushan mountain and is affected strongly by human activities. There are 72 families, 139 genus and 214 species of vascular plants in the forest in Lushan mountain. From the areal-types of families and genera of the carpophytes, the temperate components are the most abundant, while the tropical-subtropical components lie the second. It is shown that the mixed broadleaf evergreen and deciduous forest has an obvious tranSitional feature-from tropiCal-subtropical to temperate. Besides, the mixed broadleaf evergreen and deciduous forest in Lushan mountain contains a lot of paleo-taxa, so it is not thought that there were climatic conditions to form glacier in Q2 and Q3 in Lushan mountain.

常绿阔叶、落叶阔叶混交林是落叶阔叶林和常绿阔叶林之间的过渡类型,是中亚热带的地带性植被类型之一.在庐山,常绿阔叶、落叶阔叶混交林位于海拔700~1000m之间,且分布面积狭小.该区系计有维管束植物214种,分属139属、72科,以温带成分为主,其次为热带亚热带成分,具有明显的从亚热带向温带过渡的特征.该区系含有许多古老成分,表明在第四纪中晚更新世时期庐山还不具备形成冰川的气候条件.

Liriodendron chinense (Hemsl. ) Sarg. is an archaic plant native to eastern Asia. This genus was once widely distributed in the North Hemisphere in the Tertiary period.Because of the pressure from glacier movement in the Quaternary period, populations of L. chinense had been restricted in southern areas of Yantze River in so-called "refuges". Population size and structure are effected by different factors, such as, forest canopy density and artificial interference etc. According to the obvious character...

Liriodendron chinense (Hemsl. ) Sarg. is an archaic plant native to eastern Asia. This genus was once widely distributed in the North Hemisphere in the Tertiary period.Because of the pressure from glacier movement in the Quaternary period, populations of L. chinense had been restricted in southern areas of Yantze River in so-called "refuges". Population size and structure are effected by different factors, such as, forest canopy density and artificial interference etc. According to the obvious character of the small populations with low viability of seeds, especially those located in the eastern part of its distribution area in China they are now really in a non-suitable habitat-" endangering habitat". For species' falling into " endangering habitat" caused by geohistorical changes, interspecific competition or other disasters, the ex situ conservation is especially important.

鹅掌楸(Liriodendronchinense(Hemsl.)Sarg.)为古老残遗植物,该属植物在第三纪曾广布于北半球。由于第四纪冰川的压力,现存中国鹅掌楸局限星散分布于被称作“避难所”的长江流域以南亚热带山地,其种群大小和结构,受到与其共存的优势树种的竞争压力及人为干扰等多方面因素影响。目前天然分布的鹅掌楸,其种群规模小,在原生境中往往种子饱满率偏低,尤其是位于分布区东部的种群,正处于非适宜的“濒危生境”中。如果物种陷入了因地质历史变化、种间竞争或其他灾难引起的“濒危生境”中,运用迁地保护手段,可有效地保护该物种。

 
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