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sea water invade
相关语句
  海水入侵
     The influence of sea water invade to farmland soil ecosystem in Muchengyi Dalian
     海水入侵对大连市牧城驿地区农田土壤生态的影响
短句来源
     But at the same time, the river dried up breaks to flow, pollution, the sea water invade, the rare species destroy completely, atrophying or disappearing wetly, the soil erosion of the partial region turns worse to wait the ecosystem disaster also increasingly multifarious, the ecosystem environment encountered the tremendous breakage.
     但与此同时,河流干涸断流、污染,海水入侵,珍稀物种灭绝,湿地萎缩或消失,局部地区水土流失加剧等生态灾害也日益频繁,生态环境遭到了极大的破坏。
短句来源
     The sea water invade is a problem about resources and convironment in modern society, the sea water invade leads to a series of disaster about salinization land and people and animal falling ill and ecology environment location and so on.
     海水入侵是现代社会中典型的资源与环境问题,海水入侵导致土地盐碱化、人畜疾病、生态环境失调等一系列灾害的发生。
短句来源
     Administer sea water invade involves society and economy and ecology and so on, it is made policy needing alarge number information and entensive knowledge.
     治理海水入侵牵涉到社会、经济、生态等诸多方面,需要大量的信息和广泛的知识才能进行决策。
短句来源
  相似匹配句对
     Measurement of As in Sea Water
     海水中砷测定方法的探讨
短句来源
     in water of P.R.
     R.
短句来源
     in water.
     对于水,它约为4 ×10~3大气压.
短句来源
     THE DETERMINATION OF NITRATE IN SEA WATER
     海水中硝酸盐的测定
短句来源
     The technology of invade-detecting
     入侵检测技术浅议
短句来源
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The brachiopods dealt with in this paper are from the area of Latitude Nortb 33皛35?and Longitude East 85?0'~87?0' in North Tibet, where a little work has been done on the Jurassic and its fauna.So far as the northern Qinghai-Tibe-tan Plateau is concerned,these brachiopods are of the lowest benthic faunas found in the Jurassic. The brachiopods studied include 19 species of 13 genera and bio-stratigraphically can be grouped into two assemblages: Ptyctorhynchia duo&e-coensis-Tubithyris tibetica Ass. (Aalenian-Lower...

The brachiopods dealt with in this paper are from the area of Latitude Nortb 33皛35?and Longitude East 85?0'~87?0' in North Tibet, where a little work has been done on the Jurassic and its fauna.So far as the northern Qinghai-Tibe-tan Plateau is concerned,these brachiopods are of the lowest benthic faunas found in the Jurassic. The brachiopods studied include 19 species of 13 genera and bio-stratigraphically can be grouped into two assemblages: Ptyctorhynchia duo&e-coensis-Tubithyris tibetica Ass. (Aalenian-Lower Bajocian)occurring in the lower to middle part of the Sewa Fm., and Cymatorhynchia densecosta-Monsardithyris ventricosa Ass. (Middle-Upper Bajocian) being yielded in the upper part of the Sewa Fm. (or its equivalent, the Quemoco Fm.) to the bottom of the Matuo Fm. in which Burmirhynchichia-Holcothyris fauna has been found in abundance. Based on the distribution of the'brachiopods and other evidence, a general outline of the paleogeographic changes in the northern Qinghai-Tibetan Plateau as well as the movements of the Gangdese-Nianqeng Tanggula and the Qiangtang Tanggula ter-raines during Jurassic have been traced out.It is proposed that the north branch of the Eastern Tethys opened in the Early Jurassic along the Bangong Lake桸ujiang River, but the significant sea-water invasion did not happen until the Middle Ju-rassic. By the opening of the North Branch, sea-water invaded mainly from west to east and was also accompanied with the northwards directed transgression.Du-ring Bathonian, the transgression attained its largest extent, covering eastwards Eastern Yunnan and Northern Burma and reaching northwards to the north of Yanshiping-Suxian-Denqeng. Since Callovian, a regression had taken place gradu-ally from east to west with a sea-water retreating southwards. By the end of Jurassic, the Gangdese-Nianqeng Tanggula terraine collided with the Qiangtang-Tanggula terraine which had become the south margin of the China continent and the north branch of the Eastern Tethys vanished. Since Cretaceous, the north part of the plateau had gotten rid of sea-water, and the sea-waters were restricted to the south of Gangdese-Nianqeng Tanggula terraine.

在藏北双湖地区发现中侏罗世早期腕足动物13属19种。建立了Aalenian至早Bajocian期Ptyctorhynchia duogecoensis-Tubithyris tibetica和中、晚Bajocian期Cymatorhynchia densecosta-Monsardithyris ventricosa两个腕足动物组合。认为特提斯北支的演化发展及两侧板块活动是控制青藏高原北部古地理的主要因素,并决定了腕足动物群的分布特征。

The basic concepts of sequence stratigraphy can be applied to any cyclic successions regardless of their origin being marias or nonmarine .The storm base can be taken as the base level at the gentle slope side of a faulted basin for distinguishing the systems tractS as no shelf edge is present in nonmarihe fault6d basins. Most of coatinuous rethetions with high amplitude in seismic sections, misunderstood previously as the boundaries of stratigraphic unit, are maximum flooding surface (MFS)in fact. Abundant...

The basic concepts of sequence stratigraphy can be applied to any cyclic successions regardless of their origin being marias or nonmarine .The storm base can be taken as the base level at the gentle slope side of a faulted basin for distinguishing the systems tractS as no shelf edge is present in nonmarihe fault6d basins. Most of coatinuous rethetions with high amplitude in seismic sections, misunderstood previously as the boundaries of stratigraphic unit, are maximum flooding surface (MFS)in fact. Abundant and diversified microfossils and nannofossils high content of organic carbon,various authigenic minerals such as glauconie,siderite are concentrated nearby these surfaces. It means that the open sea water invaded iato the faulted basins many times in Cretaceous and Paleogene, which make a restricted environment favourable for oil generation. The trend of lake level changes is similar to that of Haq's curve generally, however, the influence of local movements and autostrahgraphic events have to be colandered. The stratal patterns and models of nonmarine sequence are proposed.

SequenceStratigraphicFeaturesofMesozoic-CenozoicNonmarineSedimentsinEasternChina¥XuHuaida;WeiKuisheng(DepartrmentofEnergyReso...

The upper member of Longtan Formation at northwestern Panxian, western Guizhou, consisting of about 11-18% coal seams and 82-89% clastic intervals, contains the most economic coal deposits in the Late Permian coal-bearing strata. Two episodes of channel-fill sedimentation are recognized in this coal-bearing unit, and they interrupt the extensive development of mires and the accumulation of peats. The widespread swamps, therefore, are developed after the regional channel abandonment. The channel-fill sandstones...

The upper member of Longtan Formation at northwestern Panxian, western Guizhou, consisting of about 11-18% coal seams and 82-89% clastic intervals, contains the most economic coal deposits in the Late Permian coal-bearing strata. Two episodes of channel-fill sedimentation are recognized in this coal-bearing unit, and they interrupt the extensive development of mires and the accumulation of peats. The widespread swamps, therefore, are developed after the regional channel abandonment. The channel-fill sandstones are 4-25m thick and 300-500m wide, have pronounced basal scours, internal erosional surfaces, sharp top contacts and abundant authigenic glauconites, and they are filled dominately by aggradational deposits, and show interconnecting shoestring-like patterns. An anastomosed channel complex is suggested by the coeval channels of different dimensions. The sheet (or tabular) sandstones, ranging from 0.2m to 3m in thickness, are interpreted as the crevasse-splay deposits. The laminated and/or massive mudrocks with abundant sideritic nodules or bands, constituting 60-80% of the deposits in sediment volumes, are assumed to the wetland deposits. Some mudrocks with marine body fossils are considered as the interdistributary bay or esturary deposits. It is suggested that the episodic development of fluvial systems and the accumulation of coals perhaps were mainly controlled by sea level fluctuations for lack of full evidences of the relative rapid subsidence near the Kangdian Uplift in the west of the study area. As the sea level rose in the early transgression, the sea water invaded and filled the incised valleys exposed at the sealevel lowstand. The water-logged incised valleys on the deltaic plain had to release the excessive water potentials by lateral avulsion. Interconnecting with the avulsion channels finally formed the anastomosed river system. The continued sea level rising led to the extensive channel abandonment and the mire development because the channel aggradation could not catch up the sea level regional channel desertion in the late transgression. However, the coal accumulation on mires developed during other stages of sea level variations became unstable, discontinuous, and are of minor economic importance because of the variable mire environments or the lowstand downward incision of channels.

龙潭组上段(24#煤顶板到12#煤)是盘县地区含煤最好的层段,对该区西北部本段地层的研究表明其中发育有网结河体系。河道沉积由多层叠置的鞋带状砂体组成,湿地沉积主要由菱铁质泥质岩夹薄层板状细砂岩(决口扇沉积)和煤组成。河流的发育和聚煤作用都显示幕式性,可能主要受海平面变化的控制。网结状河道被认为是海侵期对低位下切河谷充填过程中经侧向冲裂水道并相互连通形成的;稳定、连续的厚煤层发育于河道大范围废弃后的海侵晚期,其次是高水位早期。

 
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