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environmental changes     
相关语句
  环境变化
     On the environmental changes of the Chinese government after China's entry into WTO
     加入WTO后中国政府主要环境变化
短句来源
     Ostracoda and environmental changes of South Hongshan Lake on Tibetan Plateau during the past 150 years
     150年来青藏高原南红山湖的介形类与环境变化
短句来源
     Climatic and Environmental Changes Since 800 a B P in Pojianghaizi Lake Area, Ordos Plateau
     鄂尔多斯泊江海子地区800余年来的气候与环境变化
短句来源
     DISCUSION ON CHINESE LAKE ENVIRONMENTAL CHANGES IN THE 21ST CENTURY
     对21世纪中国湖泊环境变化的思考
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     Historical Records of Environmental Changes and Agricultural Development in Northwest China
     历史记录的西北环境变化与农业开发
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  环境变迁
     SIGNIFICANCE OF δ ̄(13)C、δ ̄(18)O OF SPELEOTHEMS FOR ENVIRONMENTAL CHANGES
     洞穴化学沉积物中δ~(13)C、δ~(18)O对环境变迁的示踪意义
短句来源
     Evolutionary Series of Dinosaur Eggs and Environmental Changes in Southwestern Henan-Northwestern Hubei
     豫西南—鄂西北一带恐龙蛋化石演化序列与环境变迁
短句来源
     The Climatic Features and Environmental Changes of Little Ice Age in Eastern China
     中国东部小冰期气候特征与环境变迁
短句来源
     The Deposits and Environmental Changes of Holocene in the Plateaus and Basins of Northwest China
     我国西北高原盆地全新世沉积与环境变迁
短句来源
     Deposit Record of Climatic and Environmental Changes of Taihu Lake Since 10,000a
     近10,000年来太湖气候与环境变迁的沉积记录
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  环境演变
     POLLEN RECORD FROM DAJIUHU BASIN OF SHENNONGJIA AND ENVIRONMENTAL CHANGES SINCE 15.753kaB.P.
     神农架大九湖15.753kaB.P.以来的孢粉记录和环境演变
短句来源
     Study on Climatic and Environmental Changes during the Past 4.0 ka in the Southern Margin of Tarim Basin, Southern Xinjiang
     塔里木盆地南缘4.0 ka来气候与环境演变研究
短句来源
     Discuss on Some Problems of Quaternary Environmental Changes in Xinjiang
     新疆第四纪环境演变若干问题的探讨
短句来源
     ADVANCE AND PROSPECTS OF LAKE SEDIMENTS AND ENVIRONMENTAL CHANGES STUDY IN CHINA
     中国湖泊沉积记录的环境演变:研究进展与展望
短句来源
     EXISTENCE OF HUMAN AND ENVIRONMENTAL CHANGES
     人类生存与环境演变
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  环境演化
     Holocene Environmental Changes of Gun Nuur in the Northern Mongolian Plateau
     蒙古高原北部Gun Nuur全新世环境演化研究
短句来源
     ENVIRONMENTAL CHANGES AND ITS RESPONDING TO TECTONIC UPLIFT OF TIBETAN PLATEAU DURING THE LAST 2.8 Ma RECORDED BY LAKE SEDIMENTS
     青藏高原2.8Ma来的环境演化及其对构造事件响应
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     In this paper, the main human activity factors causing the coastal zone environmental changes and their ways to affect the coastal zone environment are analyzed, and the important role of human activity factors in the process of coastal zone geologic environment evolution is then expounded.
     分析了引起海岸带环境变化的主要人文因素以及它们影响海岸带环境的途径,论述了人文活动在海岸带地质环境演化过程中的重要作用。
     Environmental Changes and Cultural Transition at Late Holocene in Qaidam Basin
     柴达木盆地东部环境演化对古文化的影响
短句来源
     4. By analyzing and comparing the characteristics of the climatic and environmental changes indicated by magnetic susceptibility of the GSK222 core in the northwestern Qaidam Basin since the mid-Pleistocene, we find that climatic changes exhibit periodicities of orbital (20-100 ka) timescale, and climate variabilities on ten-thousand-year and millennial timescales as well.
     4、通过对GSK222孔磁化率曲线所揭示的柴达木盆地西北缘0.78MaB.P. 以来的气候与环境演化特征的分析与对比研究,我们发现研究区的气候变化在轨道尺度(20~100ka)的变化周期均有反映,同时亦存在万年、千年尺度的气候振荡。
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  environmental changes
Leaves of mosses have a single layer of cells and are thus sensitive to environmental changes.
      
The whole climatic and environmental evolution records of Lake Ulungur were not only in agreement with the sporopollen record of the same core but also in agreement with the record of environmental changes of adjacent areas.
      
It responded to regional environmental changes and global abrupt climate events, following the westerly climate change mode on 100-year-scale, primarily with cold-wet and warmdry characteristics.
      
Subfossil Oribatid Mites as the Bioindicators of Profound Environmental Changes during the Holocene
      
It is thought that ME invasion and subsequent amplification act as a main morphogenetic factor ensuring adaptation of populations to environmental changes and, in some cases, cause rapid speciation.
      
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The bluish green pond "water bloom" is generally recognised as the typical waterquality of most high-yield fish ponds in Wuxi fish farms. A study of the ecology ofthe fish pond, the "water bloom", the biology of the dominant algae and its value as fishfood has been carried out. It was found that the bluish green color of the pond water mainly is formed bythe "water bloom" of a dinoflagellate(Gymnodinium sp.), which multiplies enormouslyunder the favorable conditions of adequate illumination, warmth, and heavily...

The bluish green pond "water bloom" is generally recognised as the typical waterquality of most high-yield fish ponds in Wuxi fish farms. A study of the ecology ofthe fish pond, the "water bloom", the biology of the dominant algae and its value as fishfood has been carried out. It was found that the bluish green color of the pond water mainly is formed bythe "water bloom" of a dinoflagellate(Gymnodinium sp.), which multiplies enormouslyunder the favorable conditions of adequate illumination, warmth, and heavily manuredwaters. It is very sensitive to environmental changes. If the algae are over populated,the pond water would damage and cause the suffocaiton of the pond fish. The integratedmanagement of heavily manuring, continous addition of freshwater, and the reasonableoperation of aerators will promote and control the multiplication of the algae. Microscopical examination on the digestive tracts showed that large amount of thealgae were taken by the silver carp, bighead carp and the finglings of common carp,crucian carp and tilapia. Obviously the "water bloom" of the algae effects greatly the production of fish pond.According to the statistics of the Fishery Team No.1 of Helie People's Commume, thefish ponds having "water bloom", the net yield of silver carp and bighead carp willincrease 33.4-37.5%.

由蓝绿色裸甲藻(Gymnodinium sp.).形成的蓝绿色水华是无锡渔区高产鱼池典型水质之一。本文对该藻的形态特征、生态、池塘培育和控制以及对鱼类的影响进行了研究。 蓝绿裸甲藻水华具喜温、喜光、喜有机氮肥,喜红褐色水色(生物因子),且对外界环境的变化十分敏感等生态特点。 蓝绿裸甲藻水华池的理化条件较差,特别是藻体繁殖过度,极易恶化水质,造成鱼类泛池。采用增施有机氮肥、合理使用增氧机、加水等综合措施可促进和控制该藻的繁殖。 经鱼类消化道镜检表明,蓝绿裸甲藻能被鲢、鳙鱼及鲤、鲫、罗非鱼鱼种大量摄食,并被鱼类消化。对无锡河埒渔业一队成鱼池三年统计,蓝绿裸甲藻水华池的鲢鳙鱼净产量比无水华池高33.4~37.5%。

Xizang (Tibet) is the main body of the "World Roof" -the Qinghai-Xizang Plateau. Although the continuous uplift of the Plateau and the global climatic changes had no distinct influence on the entire geomorphological framework notable paleogeographical evolution has been witnessed. According to C14 dating, the process can be divided into three stages. 1) early Holo-cene (10000-7500 years B.P.), when the environment became better, for instance, the retreat of glaciers, the increase of plants, the development...

Xizang (Tibet) is the main body of the "World Roof" -the Qinghai-Xizang Plateau. Although the continuous uplift of the Plateau and the global climatic changes had no distinct influence on the entire geomorphological framework notable paleogeographical evolution has been witnessed. According to C14 dating, the process can be divided into three stages. 1) early Holo-cene (10000-7500 years B.P.), when the environment became better, for instance, the retreat of glaciers, the increase of plants, the development of peat and marshes, and salt-lake precipitation in the interior of northern Xizang Plateau ; 2) middle Holocene (7500-3000 years B.P.) , when both Vegetation and peat-marshes were in the most favourable condition, the forest line occurred over the plateau surface in southern Xizang; glacier retreated to the present position; lakes were at a stage of relatively high water level; climate was warm and humid and human activities spread all over the plateau, 3) late Holocene (3000 years B.P.to the present), also known as neo-ice age. Three glacial advances are seen and natural environment deteriorates; vegetation on the plateau surface is becoming steppe and desert steppe while peat and marshes decline; lakes diminish, and most of the exterior lakes turn into interior ones on the Plateau. Furthermore, salt precipitation becomes stronger; ancient human beings migrate towards the lower parts due to the cold and dry climate, and the northern part of the N.Xizang Plateau became a depopulated area.Distinct paleogeographic regional diff erenciation is recognized in Xizang.The greatest environmental change has been witnessed in the high mountain and broad valley-lake basin region of Southern and central Xizang where the transformation of exterior lakes into interior ones, the development of peat-marshes and the advance and retreat of forest line mostly occur.

本文从冰后期以来湖泊的退缩、泥炭沼泽的发育、冰川与冻土的变化、生物的演替以及人类活动范围的扩大与缩小等方面论述西藏全新世古地理环境特征和演变过程,并结合C~(14)的年龄数据,认为全新世时期西藏自然环境的演变可分为早全新世(10,000—7,500年)环境好转阶段、中全新世(7,500—3,000年)环境最宜阶段以及晚全新世(3,000年至现在)环境恶化阶段。而且全新世不同时期古地理环境具有明显的地域差异。现时西藏地区仍在继续上升,高原内部仍将继续向干冷的自然环境变化。

This paper reports that in 1962 there were one hundred and eightyfive species of birds in the suburbs of Lanzhou. They were found to belong to 16 orders and 39 families. There were 114(92+22)species in 1981-1982, they were found to belong to 14 orders and 32(31+1) families. According to the classification 2 orders and 8 families of birds were decreased against 1962, and a new family (Glareolidae) increased.Of existing birds only 92 species are just the same as in 1962, making up 49.72% of the total in 1962....

This paper reports that in 1962 there were one hundred and eightyfive species of birds in the suburbs of Lanzhou. They were found to belong to 16 orders and 39 families. There were 114(92+22)species in 1981-1982, they were found to belong to 14 orders and 32(31+1) families. According to the classification 2 orders and 8 families of birds were decreased against 1962, and a new family (Glareolidae) increased.Of existing birds only 92 species are just the same as in 1962, making up 49.72% of the total in 1962. Other 22 new records are found to be 19.29% of existing birds.Accoraingto the feeding analysis of the decrease and increase of the birds in the suburbs of Lanzhou from 1962—1982, it may be seen that the rough trend of the past twenty years on the bird community succession in the suburds of Lanzhou is as follows: The birds of feeding on fish had remarkablly decreased; those of feeding on mice and omnivorous birds had decreased also; and those of feeding on seeds and insectivorous birds had increased in varying degrees.There are nearly twenty hunting-birds which have economic value. among the 93 species decreased, and the middle-sized and small—sized insectivorous birds have greatly decreased also.The main reasons of these phenomena are the environmental change, the pollution of the environment and indiscriminate catching and killing.The paper puts forward a proposal at last. In order to renew bird′s resources, we should try to attract the beneficial birds to stay here. In the firstplace, we must attract Swallows、Tits、 Swifts、Starlings and sc on.

本文根据1981—1982年全年在兰州市郊所采鸟类并与1962年以前在相同范围内所集鸟类对比,作出群落动态分析和益害评价。文章认为;廿年来,兰州市郊鸟类种类总的来说是减少了,引起这种减少的原因固然很多,但主要是环境污染和人为的干扰,使本来能为人类提供肉食或消灭害虫的一部分鸟类失去了应有的作用,为人类带来巨大损关。应采取生态措施,植树造林悬挂巢箱招引益鸟,使其为农林、园艺和卫生保健事业服务。

 
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