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冷荒漠
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     On cold fusion
     核聚变
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     Cold Mountain
     《山》
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     Studies on Supplcmcntary Fccding Benefit on Pregnant Ewes in Cold Season in Desert Steppe.
     荒漠草原地区季妊娠绵羊补饲效益研究
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     The daily variation of temperature in desert is always higher than that in oasis. This phenomenon embodies "cold island effect" of oasis.
     气温日变化的值荒漠始终高于绿洲,体现了绿洲的“岛效应”;
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     2. Desert forestland ecosystem
     2. 荒漠林地生态系统
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  cold desert
Soil N and S concentrations in meadow alpine tundra soil type was significantly higher than those in other four soil types (Cold desert alpine tundra soil, Lithic alpine tundra soil, Peat alpine tundra soil, and Gray alpine tundra soil).
      
The cryptoendolithic microbial environment in the Antarctic cold desert: Temperature variations in nature
      
In the Antarctic cold desert, cryptoendolithic microorganisms live under the surface of porous sandstone rocks.
      
Characteristics of successful competitors: an evaluation of potential growth rate in two cold desert tussock grasses
      
Water use efficiency and carbon isotope composition of plants in a cold desert environment
      
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According to the analyses and studies of the grain-size, sporopollen , vertebrate fossils and stratum sedimentary facies in the upper pleistocene strata of the Salawusu River area, this paper discusses the palaeogeographic environment and its evolution during the late pleistocene.1. The palaeogeographic environment of the fluviolacustrine facies strata of the Salawusu Formation formed in the early stage of the upper pleistocene is warm-hummid forest steppe.2. In the late stage of the late pleistocene, the Chengchuan...

According to the analyses and studies of the grain-size, sporopollen , vertebrate fossils and stratum sedimentary facies in the upper pleistocene strata of the Salawusu River area, this paper discusses the palaeogeographic environment and its evolution during the late pleistocene.1. The palaeogeographic environment of the fluviolacustrine facies strata of the Salawusu Formation formed in the early stage of the upper pleistocene is warm-hummid forest steppe.2. In the late stage of the late pleistocene, the Chengchuan Formation which mainly consists of aeolian sandy deposits chiefly forms under dry-cold desert, desert steppe and in the meantime, it underwent a series of alternating evolution processes of temperate-cool's shrub steppe,sparse woods steppe and forest steppe with this environment.3. The Malan loess in the area has the same geological age as that of dry cold desert steppe.4. The Salawusu Formation is assigned to the Riss/Wurm intcrglacial age, dating back to 1.1×105-7×104 yrs B.P.,thereas the Chengchuan Formation andthe Malan loess are in the Wurm glacial age with an assumed date of 7 × 104 - 1 ×104 yrs B.P..

对萨拉乌苏河地区上更新统地层作进一步划分的基础上,本文论述本区晚更新世前期萨拉乌苏组沉积时的古地理环境为暖湿的森林草原。后期城川组主要形成于干冷的荒漠草原—荒漠环境,期间经历了一系列温凉湿润的灌丛草原—疏林草原、森林草原等环境的交替演化过程。

A great number of fissures were exposed by quarrying during the past 20 yearsat Xiaoxishan hill (35° 27' 3O" N 116° 36' 24" E), Pingyi county, Shandong Province.From four of which, many manunal fossils were collected by the present authors inthe spring of 1996. Each fissure or locality has only a single fossiliferous layer. Theirstrahgraphical correlation are shown in the text figure 1.The mammal complex is composed of 14 genera and 15 species of 13 familiesbelonging to Insectivora, Chiroptera, Lagomorpha, Rodentia,...

A great number of fissures were exposed by quarrying during the past 20 yearsat Xiaoxishan hill (35° 27' 3O" N 116° 36' 24" E), Pingyi county, Shandong Province.From four of which, many manunal fossils were collected by the present authors inthe spring of 1996. Each fissure or locality has only a single fossiliferous layer. Theirstrahgraphical correlation are shown in the text figure 1.The mammal complex is composed of 14 genera and 15 species of 13 familiesbelonging to Insectivora, Chiroptera, Lagomorpha, Rodentia, Carnivora and Artiodactyla(see table 1), and comparable with those of Locality 1 and 3 of Zhoukoudian incomposition by having 10 of 15 species among them. However, the fact that themammal complex shares three and two extinct species, Erinaceus olgae, Myospalaxwongi and Megaloceros pachyosteus, with those of Locality 1 and 2 of Zhoukoudianrespectively indicates they are of the same age or Middle Pleistocene. Lithologically,Locality 1 of Pingyi seems to be comparable to the Layer 1-3 of Locality 1 ofZhoukoudian due to the same yellow sandy clay other than reddish clay as in theother layers. If the Uranium Series disequilibrium dating of the layer 1-3, about 230-290 ka, is reliable, the Locality 1 of Pingyi can be correlated to the L3 of the loesssection of Luochuan region. Strahgraphically, Both locality 3 and 4 of Pingyi shouldbe slighhy later and the locality 2 earlier than this locality.Ecologically, the fauna of Locality 1 can be subdivided into three types, desert-dry grassland (64%), shrub--grassland (18%) and wide-spread species (18%). None ofthe dwellers of the desert-dry grassland, Ochotona daurica, Myospalax wongi (directancestor of M. armandi or aspalax), Cricetulus longicaudatus, Lasiopodomys brandti,Lagurus, Meriones and Vulpes corsac distributes in present Shandong, but all in thesouthern Nei Mongol Plateau and nearby regions. This demonstrates that a migratingevent from north to south took place at that time and local environment was ratherdry and cold as in the present Southern Nei Mongol Plateau. The mammals fromLocality 3 and 4 reflect a brush--grassland condition with mixture of elements of thenorthern, the southern and the local dwellers, but those from Locality 2 a forestenvironment represented by subtropical bats, Hipposideros and Miniopterus.

平邑动物群产自4个地点(裂隙)、3个层位,由14属15种(分属食虫类、翼手类、兔形类、啮齿类、食肉类和偶蹄类)构成。这些化石反映出该地中更新世期间有一个从温暖的森林环境向干冷的荒漠草原环境又向温暖的灌丛草原环境转化的过程。

In this paper, the relationship between the vegetation distribution and the environment of the middle stretch of Tianshan M. was quantitatively investigated with the methods of DCA ordination,Twinspan classification and CCA analysis.The spatial distribution of plant communities in this area has one center and two extreme points,that is,from one center(kinds of moist plant communities inside Tianshan M.)to the dry and cold extreme points of the northern slope and dry and hot extreme points of the southern slope.Further...

In this paper, the relationship between the vegetation distribution and the environment of the middle stretch of Tianshan M. was quantitatively investigated with the methods of DCA ordination,Twinspan classification and CCA analysis.The spatial distribution of plant communities in this area has one center and two extreme points,that is,from one center(kinds of moist plant communities inside Tianshan M.)to the dry and cold extreme points of the northern slope and dry and hot extreme points of the southern slope.Further study found that types and patterns of plant communities in the studied region were determined on large scale by precipitation and temperature.On the middle and small scales the type and pattern were determined by soil humidity and soil nutrient.This conclusion explained why there were different plant community types where landforms were similar in inside Tianshan M.The spatial distribution of plant communities,the key environmental factors and environmental interpretation by mathematical models were presented in this paper.

本文通过对天山中段植物群落的DCA排序和TWINSPAN等级制分类及其与3个土壤变量的CCA典范对应分析,定量地研究了该区域植被分布与环境之间的相互关系。结果表明:天山山脉中段植物群落沿着温度和湿度两个梯度方向呈现以天山中段内部湿润植被为中心向北坡干冷荒漠植被和南坡干热砾石荒漠植被两个极点方向发展的分布格局。进一步研究发现,天山山脉中段南北坡植物群落,从大的宏观尺度上看,其类型与分布主要由降水量和温度所决定,而在中小尺度范围上,植物群落的分布与类型却与土壤湿度和土壤养分密切相关。该结果较好地解释了天山山脉中段内部,在地形地貌基本一致的情况下,植物群落类型分异很大的原因。建立了天山山脉中段植物群落梯度环境解释的数学模型和植物群落地理分布的数学模型。

 
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