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natural environment
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  自然环境
     Research on Synthetic Natural Environment Modeling and Simulation
     综合自然环境建模与仿真研究
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     THE RELATION OF KESHAN DISEASE TO THE NATURAL ENVIRONMENT AND THE BACKGROUND OF SELENIUM NUTRITION
     克山病与自然环境和硒营养背景
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     DISCUSSION OF NATURAL ENVIRONMENT OF PALAEOLITHIC SITE OF TONG-LIANG
     铜梁旧石器遗址自然环境的探讨
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     ON RELATION BETWEEN EVOLUTION OF NATURAL ENVIRONMENT AND HUMAN FACTOR AND DEVELOPMENT OF URBAN SETTLEMENT
     自然环境、人文因素演变与城市聚落发展的关系——以兰州河谷盆地为例
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     Natural Environment and Mariculture in the Leqing Bay
     乐清湾自然环境与海水增养殖
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  自然生态环境
     Result showed that the environmental quality of Zhangjiajie is mainly in good condition, and natural environment conditions have significant influences on the environmental quality for tourism.
     评价结果表明:张家界旅游环境质量总体上是好的,自然生态环境对旅游环境质量影响最大。
短句来源
     Natural Environment and Tourism Development in Yunnan
     云南自然生态环境与旅游开发
短句来源
     Conclusion The character of natural environment in the early period of Sanmenxia area had changed obviously,and had influenced the regional historical culture.
     结论 发现该地区早期自然生态环境曾发生明显变化,具有过渡性、孔道性、边缘性的特征,它通过物质生产及其技术系统等中介,深刻而又久远地影响着三门峡地区早期历史文化的发展进程。
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     The frangibility of natural environment in Karst mountainous area is astricting the development of rural economics. Therural economics which is enslaved by the traditional agricultural production is still being run at low-level efficiency.
     喀斯特山区自然生态环境的脆弱性限制着农村经济的发展,在长期的传统农业生产模式下,农村经济在低效率水平上运行。
短句来源
     Aim To discuss the relation between the natural environment in the early period of Sanmenxia area and the development of its historical culture.
     目的 探讨三门峡地区早期自然生态环境演变与该地区历史文化发展进程之互动关系。
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  天然环境
     The measured distribution coefficients(Kd) of REE between clays and solutions, ranging from 1.9 to 24.1ml/g, are significantly lower than those(10~4-10~5) obtained from the natural environment.
     实验测定REE在粘土与介质溶液之间的分配系数(Kd)变化于1.9—24.1ml/g,与天然环境获得的实际值(10~4-10~5)相差悬殊。
短句来源
     Harmonic Analysis of the Climatic Data on Natural Environment
     天然环境气候因子的谐波分析
短句来源
     In this paper, a practical application of various graphite tubes has been studied and developed for direct determination and analysis of trace Pb Cd Cu Mn Fe Zn by ZFAAS and ZAAS in natural environment water and drinking water.
     本文研究了各种石墨管的实际应用,提出采用各元素合适的石墨管,用石墨炉和火焰AA. s能直接测定天然环境水和饮用水中痕量Pb Cd Cu Mn Fe和Zn的分析方法。
短句来源
     However, the natural environment of most protein is not pure aqueous solution ,but a complex environment many organic substances .
     然而,大多数蛋白质的天然环境并不是单纯的水溶液,而是含有许多有机物的复杂环境。
短句来源
     The geological environment is a component of natural environment,it is also the shallow geological space for human living.
     地质环境是天然环境的一个组成部分,是人类居住和赖以生存的浅部地质空间。
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  “natural environment”译为未确定词的双语例句
     ⑤strengthen natural environment protection.
     ⑤加强环境保护;
     Furthermore, by adopting the experimental data and stepwise discriminant analysis,we established the preparatory dynamic balance equation for the change in the population of cyanophage PP in the natural environment as follows: N(t)=N(t-1)+N(t-n)* Y(A)* [ Y(B)-1 ] *dt-N(t)* Y(C)*dt+Y(Dt-1)
     N(t)=N(t-1)+N(t-n)~*Y(A)~*[Y(B)-1]~*dt-N(t)~*Y(C)~*dt+Y(D_(t-1))
短句来源
     The PAG absorbent gel's temperature resistance is 160℃, salt tolerance is 2x 10~5mg/l, rate of water retention (sixty days) is 98.14% in the natural environment.
     该凝胶抗温160℃,抗盐2×10~5mg/l,60天后自然条件下的保水率为98.14%。
短句来源
     Based on the natural environment developing condition and problems exist and considering the advantages and potential of the forestry development in Zhumadian city.
     根据驻马店市不同地域的自然条件和林业发展现状及存在的问题,结合驻马店市林业发展的优势与潜力,对驻马店市林业发展的布局进行了初步探讨。
短句来源
     Free-Air CO2 Enrichment, FACE, is designed to elevate CO2 concentration under field condition with no isolation and least disturbance to natural environment.
     由于FACE(Free-air CO_2 Enrichment)研究在大田条件下进行,FACE圈内没有隔离设施,CO_2可自由流动,既可保证试验的CO_2浓度,还可以使植物的地上、地下部条件与自然条件下一致,是目前研究植物对大气CO_2浓度响应的最理想的方法。
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查询“natural environment”译词为用户自定义的双语例句

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  natural environment
This paper briefly presents the research progress of the State Major Basic Research Project 2001CB309400, "Theory and Application for Retrieval and Fusion of Spatial and Temporal Quantitative Information from Complex Natural Environment".
      
Trivalent iron almost always prevailed in the acid-extractable fraction in the natural environment.
      
The calculations showed that in the natural environment, the additional light-induced heating of zooxanthellae is not above 0.01°C and that it cannot cause disruption of the animal and zooxanthellae symbiosis.
      
Observations on the development of the dinoflagellate Gyrodinium falcatum in the natural environment (Sea of Japan) and algal cultures were made.
      
The problem is extremely urgent since at least one welded joint failure leads to enormous costs of repair, may cause an environmental disaster and in ict irreparable damage on natural environment.
      
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In 1928 Curt demonstrated that non-human schistosome cercariae are capable of producing dermatitis in man. Since then many species of avian and mammalian schistosomes have been shown to produce similar disease in different parts of the world. In 1958 a kind of schistosome dermatitis locally known as 'Ya-Mu-Lan' (meaning duck-saliva-disease) was discovered in Foochow, Fukien Province. The infection occurred among farmers who waded in canals and ditches, while taking care of ducks in their natural environment....

In 1928 Curt demonstrated that non-human schistosome cercariae are capable of producing dermatitis in man. Since then many species of avian and mammalian schistosomes have been shown to produce similar disease in different parts of the world. In 1958 a kind of schistosome dermatitis locally known as 'Ya-Mu-Lan' (meaning duck-saliva-disease) was discovered in Foochow, Fukien Province. The infection occurred among farmers who waded in canals and ditches, while taking care of ducks in their natural environment. The same dermatitis was reported from Yung-siao district bordering Kwangtung. In Szechwan a similar disease was reported by T. C. Pap (1957) where it was known as 'Ya-Si-Feng' (meaning duck-feces-disease). From the endemic area in Foochow, 10, 145 snails belong to the species Lymnaea (Radix) plicatula Benson were examined and a kind of ocellated fork-tailed cercaria was discovered. Another closely related snail, Lymnaea (Fossaria) ollula Gould was also found infected but the incidence of infection was somewhat lower. Experiments were conducted to infect laboratory reared ducklings and full grown ducks, the feces of which were examined to be free from schistosome eggs. Ten to twelve days later edult worms were recovered in the mesenteric and portal veins and a few specimens were found in the lungs and heart. Lymnaea (Radix) plicatula were also experimentally infected with miracidia hatching out from eggs secured from the infected duck.Studies on the morphology of both the adult worms and the developmental larval stages were made and the details are reported in the present communication.Our observation indicates that the worm belongs to a species of Trichobilharzia different from any other known species. The name Trichobilharzia paoi sp. nov. is proposed after Prof. T. C. Pap of Chungking Medical College, Szechwan.Description of the adult worm:Male: Body slender, total length 5.35-7.31mm. width 0.076-0.095mm. Oral sucker measures 0.051-0.060ram×0.043-0.060mm in diameter. Ventral sucker, the surface of which is armed with small spines, measures 0.051-0.060mm in diameter. Oesophagus. bifurcates anterior to the ventral sucker at a distance about anterior two-thirds between oral sucker and acetabulum. Intestinal caeca iun posteriorly on two sides and reunite behind the gynaecophoric canal, which is a longitudinal slit 0.237-0.380mm in length and 0.123-0.152mm in width. Gynaecophoric canal is foimed by inward folding of two lateral sides of the body bearing numerous spines. Testes round, 70-90 in number arranged in a single longitudinal row. Their diameter ranges 0.051-0.064mm. Seminal vesicle occupies an area from a level immediately posterior to the ventral sucker to the fore margin of gyneacophoric canal. It measures 0.172-0.447mm in length and 0.038-0.055mm in width.Female: More delicate than male, length 3.38-4.89mm, greatest width 0.076-0.114mm. Oral sucker terminal with mouth openning on its ventral aspect, diameter 0.051-0.056mm×0.038-0.051mm. Ventral sucker, a small solid organ, measures 0.030-0.040mm×0.035-0.043mm in diameter. Oesophagus bifurcates at some distance before the acetabulum. Intestinal ceaca reunite behind the ovary, forming a single caecum passing to near the posterior end of body. Ovary spiral in shape with a length 0.253-0.352mm and a width 0.021-0.025mm. Seminal receptacle elongated in form, is connected to the ovary on its posterior aspect. A Laurer's canal is present. It originates from Seminal receptacle and opens to the exterior. The oviduct starts from the ovary, runs parallel with the vitalline duct to the anterior of ovary, where they unite together forming the ootype, surrounded on all sides by a cluster of unicellular Mehlis glands. The uterus is short and contains only one egg. Female genital pore is immediately postacetabular. Egg is spindle or elongate oval in shape with a sharp curved spine at one end. Egg measures 0.236-0.316mm×0.068-0.112mm. Avian schistosomes parasitising domestic and wild ducks and other birds belong to the subfamily Bilharziellinae Price, 1929, and family Schistosomatidae Looss, 1899. They were formerly considered to belong to two genera, namely Pseudobilharxiella Eismont, 1929 and Trichobilharzia Skrjabin and Zkharow, 1920. Yamaguti (1958) consideted Pseudobilharziella to be the synonym of Trichobilharzia and listed 22 species in his "Systema helminthum". Recent additions of some new species made up the total of about 25 species. In comparing the structure, it is found that the Chinese species belongs to those duck schistosomes with spindle-shaped eggs. Among them the most closely related is T. yokogawai (Oiso, 1927), from which it differs in several important aspects, such as the size of the worm, the extent of gynaecophoric canal, number of testes and size of eggs. Their different characters are tabulated as follows:T. yokogawai T. paoi n. sp. Male Body length 2.0-2.75mm 5.35-7.31mm (Foochow specimen)average 2.336mm 4.0-10.3mm (Chungking specimen) Position of immediately behind 0.371-0.495mm behind gynaecophoric Acetabulum acetabulum (Foochow specimen) canal 0.35-0.57mm behindacetabulum (Chungking specimen) T. yokogawai T. paoi n. spLength of 0.2mm 0.247-038mm (Foochow specimen)gynaecophoric 0.35-0.41mm (Chungking specimen)canalNumber of 50-70 70-90 (Foochow specimen)testes 50-85 (Chungking specimen)Size of eggs Length 0.204-0.238mm 0.236-0.316mmWidth 0.051-0.068mm 0.068-0.112mm (Foochow specimen)0.215mm0.075mm (Chungking specimen)From the above table it can be noticed that these two species can be distinguished by these essential differences.T. paoi is, furthermore, differentiated from T. physellae, another closely related species by the number of testes, which is about 210-240 in the latter and are arranged in two to three rows. Tanaka (1960) reported another duck schistosome from Oki Island, which he identified as T. physellae. According to this auther, the male has only 52-78 testes, the seminal vesicle is much shorter reaching only about half distance between gyaaecophoric canal and the acetabulum. Another striking difference is that the intestinal ceaca of T. physellae from Oki Island reunite at the region anterior to the seminal vesicle, while in T. paoi they reunite behind the Seminal receptacle at the level anterior to the gynaecophoric canal.Macfarlane (1944, 1949) and Olivier (1949) have shown that the dermatitis produced by avian schistosomes is a sensitization phenomenon. They have demonstrated striking differences in the reaction of skin of infected animals to the penetration of cercariae in the initial and subsequent infections, and presented evidence for the ideathat human cases also become increasingly allergic to the protein of invading schistosome cercariae. In order to make further inquiries on this problem and to investigate whether Chinese species of Trichobilharzia will induce similar reactions in the mammalean host, experiments were conducted to infect laboratory-reared white mice and biopsies made of the skin in the first and also after a series of repeated infections It is with the purpese to observe the behavior of the cercariae after having penetrated into the body of an abnormal host, and to trace the course of their migration and destiny.1. Tissue reaction in primary infection: Histological sections were made on biopsies on various intervals after infection, one and half hour, 3 hours, 5 hours, 8 hours, 21 hours etc. At one and half to three hours after exposure, the cercariae already penetrated the epidermis. Some of them were in the hair follicles. A few arrived at the corium. Those just penetrated Corneum stratum were found lying there horizontally, and usually there was a small tunnel or cavity, formed among the epithelial cells, surrounding each cercaria. Such phenomenon is similar to that as observed by Gordon and Griffiths (1951) on the behavior of the cercaria of Schistosoma mansoni. Olivier and Weinstein (1953) also observed the same in Trichobilharzia ocellata. During early hours of invasion there was apparently very little cellular response to the cercariae. Those, which invaded the corium, were surrounded by a small number of leucocytes. Apparently the cercariae were still in good condition. They were probably living at the time of biopsy as indicated by their intact cell structure being well stained, 21 hours after infection, the tissue shows more infiltration of white cells and histiocytes. More of them gathered around the cercariae, some of which appeared as having signs of histolysis, while others seem still quite normal. Observations made on tissues fixed at later hours after infection indicated that even in the primary exposure, great majority of the invading cercariae were already arrested and immobilized in the epidermis and not able to invade further into the body.A small part of the cercariae, however, were found to migrate to the lung tissue. They were evidently being carried by the blood stream to the new site, where they produced considerable tissue damage and hemmorrhage. In our experiments with mice infected 20 hours previously, petechial hemorrhages were present on the surface of the lung. Infection experiments were conducted on 19 mice, each of which was infected with 80 to 250 cercariae. Dissections of the animals were made at various intervals from one day to about a month since exposure. The largest number of worms and hemorrhagic spots were found on the lung tissue during the second and third day after infection. Of the 19 mice, 15 were found to show pulmonary lesions. The number for each mouse ranges from one to 86. From eleven of them, worms were recovered from the tissue and from each mouse from one to 15 worms were counted. When the dissections were made during the first three days, the worms were still living. As time elasped, only formation of nodules were found. Sectioned nodules contained worms which were either dead or moribund.2. Tissue reaction in repeated infecti

1.在福建省各地流行着一种称为“鸭姆涎”的血吸虫皮肤疹,特別在鸭群放牧的地区,农民下水,手足发痒。这种皮肤疹的病原,经調查系一种寄生于家鴨体內的新种血吸虫,定名为包氏血吸虫。Trichobilharzia paoi Sp. Nov. 2.本虫的雄虫及雌虫經詳細叙述。其寄居的位置也經确定以門靜脉为最多,其次为腸系膜靜脉,并在肺部及心脏也有寄居。3.本虫的中間宿主为两种椎实螺Lymnaea(Radix)plicatula Benson及Lymnaea(Fossaria)ollula Gould。4.发育各期均在实驗室內詳經現察,包括卵、毛蚴、母胞蚴、子胞蚴和尾蚴,及成虫名阶段的发育。各期的构造經詳細的叙述。尾蚴的习性也經观察和叙述。5.本虫的分类問题經詳細討論。6.尾蚴侵入实驗动物——小白鼠后所引起的組织反应,經详细研究。实驗曾經举行比較初次感染和重复感染后组织对于侵入的虫体所引起的不同程度的反应。实驗証明初次感染的,幼虫能侵入表皮、皮层及真皮,白血球浸潤的現象较为微弱,虫体在一两天內尚是存活?啻胃腥镜慕M織內反应较为强烈,白血球以及組織吞噬細胞包圍虫体的更多?嫣宓妮喞炔幻飨员硐植皇谴婊畹那榭觥N豺是秩胄“资筇迥...

1.在福建省各地流行着一种称为“鸭姆涎”的血吸虫皮肤疹,特別在鸭群放牧的地区,农民下水,手足发痒。这种皮肤疹的病原,经調查系一种寄生于家鴨体內的新种血吸虫,定名为包氏血吸虫。Trichobilharzia paoi Sp. Nov. 2.本虫的雄虫及雌虫經詳細叙述。其寄居的位置也經确定以門靜脉为最多,其次为腸系膜靜脉,并在肺部及心脏也有寄居。3.本虫的中間宿主为两种椎实螺Lymnaea(Radix)plicatula Benson及Lymnaea(Fossaria)ollula Gould。4.发育各期均在实驗室內詳經現察,包括卵、毛蚴、母胞蚴、子胞蚴和尾蚴,及成虫名阶段的发育。各期的构造經詳細的叙述。尾蚴的习性也經观察和叙述。5.本虫的分类問题經詳細討論。6.尾蚴侵入实驗动物——小白鼠后所引起的組织反应,經详细研究。实驗曾經举行比較初次感染和重复感染后组织对于侵入的虫体所引起的不同程度的反应。实驗証明初次感染的,幼虫能侵入表皮、皮层及真皮,白血球浸潤的現象较为微弱,虫体在一两天內尚是存活?啻胃腥镜慕M織內反应较为强烈,白血球以及組織吞噬細胞包圍虫体的更多?嫣宓妮喞炔幻飨员硐植皇谴婊畹那榭觥N豺是秩胄“资筇迥?有一部分能侵入肺部,产生出血斑点及結节。結节內有虫体凋炘^明首次感染的小白鼠侵入肺部的虫体,出血斑点及結节均更多,重复感染的逐次減少。多次重复感染后肺部找不到虫体或找到极少数的虫体和出血斑点。7.本文就实验的結果进行討論。

Based on more than twenty years' experiences in rubber planting in China, this paper deals with the relations between the factors concerning the natural environmental conditions in different rubber planting areas and the characteristics of phenotypes of rubber trees in their growth and yield. In addition, comparisons have been made between the advantages or disadvantages of the natural environments in some tropical rubber-producing countries and those of China. It has been considered successful and of...

Based on more than twenty years' experiences in rubber planting in China, this paper deals with the relations between the factors concerning the natural environmental conditions in different rubber planting areas and the characteristics of phenotypes of rubber trees in their growth and yield. In addition, comparisons have been made between the advantages or disadvantages of the natural environments in some tropical rubber-producing countries and those of China. It has been considered successful and of great importance that rubber trees can be cultivated on large scale in the monsoon climate districts of tropical and south subtropical zones at 17°N. According to the geographic and geomorphological factors and the ecological aspects of various tropical crops, the criteria have been established for dividing the areas of China's tropical zone and south subtropical zone. This paper also emphasized the importance of exploiting China's valuable tropical natural resources and making full use of them in line with local conditions. Hence a reasonable distribution of various kinds of tropical crops has been put forward on the basis of latitude and elevation together with local natural conditions. In addition, a program has also been made for speeding up the establishment of the production bases of rubber, coconut, agave and other tropical crops, so as to meet the needs of the four modernizations in China.

本文在总结我国植胶20多年有关经验的基础上,论述了各植胶区的自然条件因素与橡胶树生长、产胶等表现型特征之间的关系,并与一些热带植胶国家自然条件的利弊作了对比分析,肯定了我国在北纬17°以北的热带、亚热带季风气候区大面积植胶成功的重要意义,并根据地理、地貌因素,各种热带作物的生态表现,提出了我国热带、南亚热带划分的依据。强调了因地制宜,充分利用开发我国宝贵的热带自然资源的重要性。为此,进一步提出了按纬度、海拔高度以及当地自然特征相结合的各种热带作物的合理布局,以及加速建立橡胶、椰子、剑麻等热作生产基地的方案,以适应我国四个现代化建设的需要。

The present paper mainly disses the impacts of East and Middle-Route water diversion from the Changjiang River to the Huang-Huai-Hai Plains upon natal environment.1.Studies of the changes of water circulation and water resources as well as their relationships with biocycle, atmospheric circulation and geologic process are key problems concerning the impact of inter-basin water transfer on natural environment. The process With respect to the impact of water transfer on the environment can be Summed...

The present paper mainly disses the impacts of East and Middle-Route water diversion from the Changjiang River to the Huang-Huai-Hai Plains upon natal environment.1.Studies of the changes of water circulation and water resources as well as their relationships with biocycle, atmospheric circulation and geologic process are key problems concerning the impact of inter-basin water transfer on natural environment. The process With respect to the impact of water transfer on the environment can be Summed up roughly by the following model.Water transfer→changes of the original hydrological regime→changes of thenatural environment→changes of social economy.2.The impacts of any water transfer project on the environment., according to geographic regions, may be divided into three different regions with regard to issues, namely, the water-exported region, the region through ,which water is transferred and the water-imported region.The water-exported region, With the completion of the .water transfer, influence will chiefly occur at the initial point where water starts to be exported and at the lower reaches of the river below the initial point during low-flow period.The main influence of water transfer on natural environments are as follows. Possible intensification of sea water intrusion, the acceleration of the deposition of fine particles and the expansion of bars in the Chang-jiang estuary due to the decrease of runoff of Changjiang river in low-flow periods.3.The region through which water is transferred.It mainly refers to areas on both sids of the conveyance canals as well as to the surroundings of the .water bodies of regulation and storage that are involved .Water transfer of the East route will certainly exert some influence on the water quality and aquatic ecosystems of the lakes. 4.The water-imported region: Large quantities of water diverted from Changjiang River into the Huang-Huai-Hai Plains through the middle and East Roites will inevitably cause great changes on ecosystems of the Plains. The major problems to be ackled concerning impacts of water transfer on natural environment in the water imported region are as follows. The prevention of secondary salinization and alka-lization in irrigated areas and the influence of water transfer on climate in irrigated areas and their surrounding environments.

本文主要讨论了从长江向黄淮海平原调水对自然环境的影响。 研究水分循环和水资源的变化及与之有关的物质循环的关系,是研究跨流域调水对自然环境影响的核心问题。调水对环境影响的过程,大体可归结为如下的模式:调水→改变原有的水文情势→自然环境的变化→社会经济的变化。 任何调水工程对环境的影响,均可按地理分区方法分为水量输出区、输水通过区和水量输入区。南水北调对水量输出区的影响主要在枯水期发生在输水点附近及其下游。输水通过区主要使输水渠两侧和蓄水体周围环境受到影响。大量长江水调入黄准海平原,在一定程度上将引起黄淮海平原生态系统的变化。

 
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