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arctic region
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  北极地区
     This article discusses the design and implementation characteristic of ordinary multimedia electro-map, and Arctic region multimedia electro-map was designed and implemented based on the software Atlas 2000. This article has an important reference value for the developing of multimedia electro-map integrated software and the design of electro-map.
     本文在Atlas2000软件平台下,设计和制作了北极地区多媒体电子地图,对于多媒体电子地图集成工具的开发和电子地图的设计开发具有一定的参考价值。
短句来源
     A Possible Aerosol Source to Arctic Region ——Gobi Desert and Loess Plateau of China
     一个可能的北极地区气溶胶源——中国戈壁沙漠与黄土高原
短句来源
     Based on the comparison of Caryophyllaceae cyclopeptides from boththe Qinghai-Xizang (Tibet) Plateau and Arctic region, it is proposed that cyclopeptides are characteristiccomponents of Caryophyllaceae and Arctic region is one part of the distribution center of Caryophyllaceae.
     通过对北极石竹科环肽与青藏高原石竹科环肽的比较,证明了环肽是石竹科的特征成分以及北极地区是石竹科植物分布中心的一个区域。
短句来源
     The Global warming has been causing rapid changes in the Arctic region.
     全球变暖引发了北极地区的快速变化。
短句来源
     THE DESIGN AND IMPLEMENTATION OF ARCTIC REGION MULTIMEDIA ELECTRO-MAP
     基于Atlas2000的北极地区多媒体电子地图开发
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  北极
     Quantitative analysis of aerosol samples, collected in the marine boundary layer in the Arctic region during the First Chinese Arctic Research Expedition, was performed using synchrotron radiation X-ray fluorescence (SR-XRF) and ICP-MS method.
     本文应用同步辐射加速器X荧光(SR-XRF)分析技术并结合电感耦合等离子体质谱(ICP-MS)方法对中国首次北极考察采集的气溶胶样品进行了定量分析。
短句来源
     The Constituents of Volatile Oil from Three Caryophyllaceae Species in Arctic Region and Their Chemotaxonomy Significance
     三种北极石竹科植物的挥发油成分及其化学分类学意义
短句来源
     This article discusses the design and implementation characteristic of ordinary multimedia electro-map, and Arctic region multimedia electro-map was designed and implemented based on the software Atlas 2000. This article has an important reference value for the developing of multimedia electro-map integrated software and the design of electro-map.
     本文在Atlas2000软件平台下,设计和制作了北极地区多媒体电子地图,对于多媒体电子地图集成工具的开发和电子地图的设计开发具有一定的参考价值。
短句来源
     THE EXPERIMENT STUDY OF BOUNDARY LAYERPHYSICAL PROCESS IN ARCTIC REGION
     北极边界层物理过程的考察与研究
短句来源
     A Possible Aerosol Source to Arctic Region ——Gobi Desert and Loess Plateau of China
     一个可能的北极地区气溶胶源——中国戈壁沙漠与黄土高原
短句来源
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  “arctic region”译为未确定词的双语例句
     APPLICATION OF SZD/2 1600 COMBINED ELECTROSTATIC PRECIPITATOR TO CEMENT MILL IN ARCTIC REGION OF NORTHWEST OF CHINA
     SZD/2-1600型组合式电除尘器在西北高寒地区水泥磨上的应用
短句来源
     DISCUSSION ON CORRECTION OF SBR DESIGN PARAMETERS IN ARCTIC REGION
     北方寒冷地区SBR设计参数的修正及其探讨
短句来源
     In general,the conductivity of the Antarctic region is higher than that of the Arctic region.
     分析表明,从总体来看,南极区地下电导率高于北极区
短句来源
     In Kashmir, the bed E1 (Claraia bioni zone) of Guryul Ravine section is correlated with the Claraia cf. bioni bed of Huangzhishan section based on bivalves. In the Arctic region the bed of Otoceras concavum zone is most probably corresponding to the ammonite Hypophiceras zone of Meishan.
     bioni层,此层也可与克什米尔Guryul Ravine剖面E_1层(Claraia bioni带)对比;
短句来源
     (7) the Arctic region moves to the east as a whole;
     7北极区总体向太平洋北缘运动;
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  arctic region
Peoples of the arctic region and the short peoples of the equatorial regions are less dimorphic in stature than midlatitude peoples.
      
Very closely related plants to the new taxon are known from Central Siberia and from the Arctic region.
      
Carex bigelowii complex is a group of taxa distributed over the whole Arctic region and in the mountains of the temperate zone.
      
A small portion of Hg emissions in Eurasia and North America is deposited in the Arctic region, perhaps 60 to 80 t annually.
      
The attenuation model is used to explain the evolution of the Arctic region.
      
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Using the data of the Arctic ice index and southern oscillation Index (SOI)for 1953?984, the time-lag correlation is analysed between the Arctic ice coverage and southern oscillation. Statistics is obtained for the average frequency of southern oscillation Index in the positive departure years and negative departure years of the Arctic ice index.The preliminary results show that they both have obvious interrelationship. The maximum value of the lag correlation is found between southern oscillations...

Using the data of the Arctic ice index and southern oscillation Index (SOI)for 1953?984, the time-lag correlation is analysed between the Arctic ice coverage and southern oscillation. Statistics is obtained for the average frequency of southern oscillation Index in the positive departure years and negative departure years of the Arctic ice index.The preliminary results show that they both have obvious interrelationship. The maximum value of the lag correlation is found between southern oscillations months earlier (I region, +0.43) and 39 months later (all the Arctic region, + 0.38) .Statistics of the Arctic ice positive departure years and negative departure years also confirms the characteristics.

本文根据1953~1984年的北极海冰覆盖面积指数和南方涛动指数资料,分析了北极各海区海冰覆盖量与南方涛动的时滞相关关系,统计了北极海冰正距平年和负距平年南方涛动指数的平均情况。初步结果表明,北极各区海冰与南方涛动之间均存在明显的相关关系,时滞相关的最大值从南方涛动早于海冰7个月(Ⅰ区,+0.48)到晚于海冰39个月(整个北极,+0.38)不等,对北极海冰正距平年和负距平年的统计结果也证实了这些相关特点。

Based on J. A. Clark's isostatic model of global sea level changes, this paper discusses the effect of formation of ice sheet in Arctic region on the movement of the Earth's core. Numerical calculation shows that the ocean surface in different regions may fluctuate about 1.54m due to eccentric movement of Earth's core. Summarizing this calculation result and the result of Clark's isostatic model, the predicted result is in good agreement with the previously observed data. After balancing the action...

Based on J. A. Clark's isostatic model of global sea level changes, this paper discusses the effect of formation of ice sheet in Arctic region on the movement of the Earth's core. Numerical calculation shows that the ocean surface in different regions may fluctuate about 1.54m due to eccentric movement of Earth's core. Summarizing this calculation result and the result of Clark's isostatic model, the predicted result is in good agreement with the previously observed data. After balancing the action of ice sheet in Antarctic region, we assume the partial melting of ice sheet in Arctic region V to be 25.7 Mkm~3, and its gravity is the same as a curved disc. By the calculation, we can see that when the solid core moved toward ice sheet 2.1 kin, the gravity of ice sheet can be balanced with the liquid core This movement of the solid core can raise (or lower) the sea-level 1.54 m in the Northern Hemisphere and lower (or raise) 1.54m in the Sou- thern Hemisphere. After postglacial isostatic adiustment, the exess masses of ice sheet will disappear. and the solid core will move back to the Earth's centre. The sea level will change in the same way. When this ice sheet melted, all the changes would be reverse. Thus this method is provided for calculating the changes in sea level which cocur when ice and water masses are redistributed on the surface of elastic and viscoelatic non-rotating Earth models after Farrell and Clark. Morner (1987) and Vestine (1957) have pointed out this movement of the core. In this paper, the calculation only provide the dynamic process for this movement.

以J.A.Clark为代表的全球海面变化均衡模式为基础,讨论冰盖形或对地核运动的影响。数值计算表明,由于地核偏离地心的运动,不同海区大约有±1.54m的海面波动。把这个结果叠加在均衡模式的结果之上,会使预测的结果与所观察结果更为符合。

A new osleolepidid crossopterigian, Thursius wudingensis sp. nov., is described from the middle Devonian Haikou formation, Wuding, Yunnan, China. This is the first description of csteolepidid fish from China. The fossil materials were discovered in the quarry of Wuding cement factory in early 1960's. Several Placoderm forms from the same site were identified by Zhang Guorui (1965, 1980) as Dianolepis, Xichonolepis, and Bothriolepis. Recently, more materials have been collected from the site. These and those...

A new osleolepidid crossopterigian, Thursius wudingensis sp. nov., is described from the middle Devonian Haikou formation, Wuding, Yunnan, China. This is the first description of csteolepidid fish from China. The fossil materials were discovered in the quarry of Wuding cement factory in early 1960's. Several Placoderm forms from the same site were identified by Zhang Guorui (1965, 1980) as Dianolepis, Xichonolepis, and Bothriolepis. Recently, more materials have been collected from the site. These and those collected years ago include most parts of the head of an osteolepidid fish. Since they are all cosmine covered, have the same color, similar thickness and size, it is natural to consider them as belonging to the same form. With reference to the description and plates of Scotland osteolepidid fish (Jarvik, 1948), these disarticulate dermal bones are recognized and reconstructed as an almost complete head. And a new species is set. Osteolepiform Jarvik, 1942 Osteolepididae Cope, 1889 Thursius Traquair, 1888 Thursius wudingensis sp. nov. (Figs. 1-8; Pl. 1-3) Diagnosis Anterior part of Cranial roof downwards strongly. Fenestra exonarina anterior rather ventral. Orbital notch relatively deep. Preorbital corner acute. Pineal foramen on or slightly behind the transverse line through the postorbital corner, and antero-medially to the anterior end of the frontal pit-line. Separated premaxillaries at the anterior end of the frontoethmoidal shield. Dermosphenotic narrow and long. Lateral extrascapular over median extrascapular at the medial-lateral margin. Jugal relatively short and high, its dorsal-anterior margin as part of orbital fenestra. Maxillary relatively short and high. Principal gular short and broad. Tubes of the sensory canal short, unbranching. Pores of the tubes in single rows. Frontal pitline long, to or near the posterior margin of the frontal close to the medial end of that margin. Anterior end of the frontal pit-line postero-lateraily to the pineal foramen. Quadratojugal pitline ventrally to or near the ventral margin of the bone at about the middle point of that margin. Pit-line of principal gular in front of the middle point of the bone. Geological horizon and locality Haikou Formation (Givetian, middle Devonian), Wuding County, Yunnan Province. Remarks Thursius was first described and named from Scotland by Traquair in 1888. There are totally six species described since then. Besides Scotland, they were located in Greenland (Jarvik, 1961) and Baltic region (Vorobyeva, 1977). The new species differs from the other species in the following characters: (1) The preorbital corner is acute. (2) The orbital notch is deep (1.i.o/dp.i.o:2.20-3.16, other species not smaller than 3.60). (3) The pineal foramen situated on or slightly behind the transverse line through the postorbital corner, this can be seen in Thursius macrolepidotus, meanwhile it is antero-medially to the anterior end of the frontal pit-line, which is the character of Th. pholidotus. The two parts' combination is characteristic to the new species. (4) The jugal is relatively short and high (1.Ju/ht.Ju:1.05-1.28, other species not smaller than 1.38). (5) Maxillary is short and high (1.Mx/ht.Mx:3.90-4.19, other species not smaller than 4.50). (6) Principal gular is short and broad (1.G/br.G:2.41-2.76, other species not smaller than 2.80). (7) Separated premaxiliary is seen on the anterior end of the fronto-ethmoidal shield. Discussion Thursius were previously found only within the scope of Europe (Scotland, Greenland and Baltic region). None was discovered in any other continent. So the occurrence of Thursius in China extends the area of distribution of the genus. It provides new materiel for the study of Devonian biogeography. From the placoderms of the same period from China, the early Devonian species were mostly endemic, the middle and late Devonian species tend to be cosmopolitan. However, the crossopterygian has no such tendency. For example, Youngolepis from lower Devonian of Qujing, Yunnan is quite similar to Powichthys from the Arctic region of Canada (Chang and Yu, 1981). Together with the appearance of Thursius from middle Devonian in China, it is reasonable to assume that the crossopterygians are more adaptive and more capable in migration. The presence of separated premaxillaries was regarded as a character shared by Youngole- pis and Powichthys. These two group had quite a few similarities, and were regarded as forming a natural group. This group shared characters with Porolepiformes, Osteolepiformes and Dipnoi. It is now generally regarded as a sister group of Porolepiformes. However, Youngolepis was originally regarded as an osteolepid (Chang, 1966). Presently, Youngolepis was considered as the sister group of Coanata (Osteolepiformes+Tetrapod) (Panehen and Smithson, 1987). As mentioned above, the separated premaxillaries without nasal and rostral components can be seen in Thursius wudingensis. Apart from this, there are some other similarities between Th. wudingensis and Youngolepis: squamosal, quadratojugal and preopercular usually fused as a compound cheek bone. The form and situation of the frontal pit-lines and the pit-lines on the parietal are also similar. The posterior ends of the frontal pit-lines and the posterior oblique parietal pit-lines may correspondingly reach or near the posterior margin of the frontals or parietals. With these similarities Thursius wudingensis is probably a primitive group in Osteolepidae. On account of the lack of endocranian characters of the new species, further comparisonsare not available. It's too early to ascertain the relationship between the two group. Only to certain extant, these similarities support the previous view of Chang and the hypothesis proposed by Panchen et al, that is Youngolepis may be the sister group of Osteolepiformes or Osteolepiformes+Tetrapods.

本文记述的是采自云南武定中泥盆统地层中的一个总鳍类、骨鳞鱼目(Osteolepiformes Jarvik 1942)、骨鳞鱼科(Osteolepididae Cope 1889)的瑟索鱼属(Thursius)化石新种——武定瑟索鱼(Thursius wudingensis sp. nov.).对骨鳞鱼化石的记述在国内尚属首次.本文除了对化石新种进行描述和分类之外,还对武定瑟索鱼的生物地理意义以及它与杨氏鱼的关系作了尝试性的探讨.

 
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