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   population growth 在 环境科学与资源利用 分类中 的翻译结果: 查询用时:0.214秒
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population growth
相关语句
  人口增长
    Population Growth and Ecological Environment Deterioration in Africa
    非洲的人口增长与生态环境退化
短句来源
    POPULATION GROWTH, ECONOMIC GROWTH AND TECHNOLOGICAL CHANGE IN RELATION TO THE ENVI-RONMENTAL CHANGE --MODERN ENVIRONMENTAL CHANGE IN CHINA (1952-1990)
    人口增长、经济增长、技术变化与环境变迁——中国现代环境变迁(1952—1990)
短句来源
    REGULARITY GOVERNING WORLD POPULATION GROWTH AND ITS GEO-ENVIRONMENT CHANGE
    全球人口增长及其地质环境变化
短句来源
    Population Growth and Sustainable Development
    人口增长与可持续发展
短句来源
    (3)This paper builds the WECC system dynamics model of river, comprehensively considering many factors including economic development, population growth, environmental capacity of pollutant, the river ecological and environmental water demand, the control measures of water pollution and the protective plan of water environment, simulating the indexes in WECC index system.
    (3)建立了河流水环境承载力系统动力学模型,综合考虑了经济发展、人口增长、污染物环境容量、生态环境需水量、水污染控制措施、水环境保护规划等诸多方面的因素,对水环境承载力指标体系中的指标进行模拟,水环境承载力系统动力学的建立与模型模拟能够对水环境控制措施进行量化,对改善桑干河流域的生态环境具有实际的指导意义。
短句来源
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  种群增长
    The effects of Di-n-butyl phthalate (DBP), Di (2-ethylhexyl) phthalate (DEHP) and Butyl benzyl phthalate (BBP) on population growth and sexual reproduction of Brachionus calyciflorus were studied by means of 3-day population growth and 4-day resting egg production tests, and with 17β-estradiol (E2) as the positive control.
    以萼花臂尾轮虫(Brachionus calyciflourus)为受试动物,以17β-雌二醇(E2)为阳性对照,运用3d种群增长和4d休眠卵产量实验方法研究了不同浓度的邻苯二甲酸二丁酯(DBP)、邻苯二甲酸二异辛酯(DEHP)和邻苯二甲酸丁苄酯(BBP)对轮虫种群增长和有性生殖的影响。
短句来源
    Study on Population Growth Process and Interspecific Competition of Prorocentrum donghaiense and Alexandrium tamarense
    东海原甲藻与塔玛亚历山大藻种群增长过程与种间竞争研究
短句来源
    There was a 24 hour time lag between population growth and 2,4 D degradation.
    种群增长与 2 ,4 D降解有约 2 4h的时滞 ;
短句来源
    It is shown from the test results that the H_2O_2of low concentration had slight stimulating effects on the microalgal population growth, the stimulating effect changed to the inhibiting effect with increasing H_2O_2 concentration, and the higher the H_2O_2 concentration and the longer the exposure period, the greater the toxic effect of H_2O_2;
    结果表明,低浓度的H2O2对微藻种群增长有微弱的促进作用,随着H2O2浓度的增加,促进作用变为抑制作用,抑制率也由负变正,并且H2O2浓度越大、作用时间越长其毒性作用越大;
短句来源
    THE BACTERIA AND ALGAE POPULATION GROWTH DYNAMICS IN OXIDATION PONDS
    氧化塘中菌、藻种群增长动态
短句来源
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  “population growth”译为未确定词的双语例句
    Compared to the control, 0.05- 5 000 μg/L E2, and 500 μg/L BBP increased significantly the population growth rate of the rotifers, but the reverse was true for 0.5 and 5 000 μg/L DBP, and 0.05 and 0.5 μg/L BBP.
    结果显示,与空白对照组相比,0.05-5000μg/L的E2和500μg/L的BBP显著提高了轮虫种群增长率,而0.5和5000μg/L的DBP以及0.05和0.5μg/L的BBP使轮虫种群增长率显著降低;
短句来源
    In the range of experiment concentration, significant dose-response relationships existed between the ratio of ovigerous females/non-ovigerous females and E2 concentration, fertilization rate as well as the population growth rate and DBP concentration, resting egg production and DEHP, and mictic rate and BBP concentration.
    在实验设置浓度范围内,轮虫种群中的混交雌体数/非混交雌体数与E2浓度间、轮虫种群中的混交雌体受精率和种群增长率与DBP浓度间、轮虫休眠卵产量与DEHP浓度间、轮虫混交率与BBP浓度间均具有显著的效应-剂量关系
短句来源
    After treated with different concentrations of test pesticides, the population growth curves were all sigmoid, and accorded well with Logistic model (R2>0.8).
    不同农药不同浓度处理下,草履虫密度增长曲线均具有“S”型生长特点; 农药胁迫下草履虫密度增长曲线符合Logistic模型(R2>0.8),3种农药胁迫下K值明显降低;
短句来源
    Effects of Water Acidification on the Dynamics of Population Growth of Brachionus bidentata
    水质酸化对双棘臂尾轮虫种群动态的影响
短句来源
    The contradiction between the supply and the demand of water surges increasingly with society development and population growth.
    随着社会的发展和人口的剧增,水的需求与供给之间的矛盾日益突出。 世界各国都把水资源的开发利用和保护放在优先地位。
短句来源
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  population growth
A new class of competition models in which the population growth coefficients are represented by periodic delta-functions is designed.
      
Analysis of the available field and published data indicates a two-stage pattern of the population growth phase and a synchronous transition of wolf populations to this phase.
      
Selenium in concentrations of 0.01 and 0.5 mg/liter stimulated cell population growth, while the number of ultrastructural alterations was the same as in the control cells.
      
At a selenium concentrations of 1 mg/liter, cell population growth slightly decreased by the end of the experiment, and there was some increase in the number of cells with damaged organoids and in the number of completely destroyed cells.
      
salina, suppressing cell population growth and promoting extensive destructive changes.
      
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This paper shows the results of our analysis of various population data, mainly from the "10% Sampling Tabulation". The analysis covers the following six aspects with a brief discussion on the current issues. (1) The female fertility status. (2) The average age specific (1-49 years old) of female mortality during the year 1983-2000, including both the urban and the rural population, the life span and the age specific death of the whole population. (3) The accumulative birth rate of minority people from 1983-2000...

This paper shows the results of our analysis of various population data, mainly from the "10% Sampling Tabulation". The analysis covers the following six aspects with a brief discussion on the current issues. (1) The female fertility status. (2) The average age specific (1-49 years old) of female mortality during the year 1983-2000, including both the urban and the rural population, the life span and the age specific death of the whole population. (3) The accumulative birth rate of minority people from 1983-2000 and estimation of population rate of Taiwan, Hongkong and Macao areas. (4) The estimation of birth rate of children bearing females in the year 2000. (5) The estimation of birth rate by means of a mathematical method. (6) The estimation of population growth rate during the next hundred years by using Leslie matrix.

本文介绍了对以“10%抽样资料”为主的各种人口数据的分析结果,并对到本世纪末的中国人口数进行了五种假设,提出了解决人口问题的对策.

Human population, resources and environment are interdependent and interacted. This restrictionship can be seen in the semi-arid zone in eastern Inner Mongolia where the ecological condition is limited. Population growth brings unceasingly spread of desertification in eastern Inner Mongolia. Population growth causes a) decrease of average acreage of arable land for each man due to the reclaim of rangeland and abandonment of infertile farmlands;b) blind increase of animal number and over-loading...

Human population, resources and environment are interdependent and interacted. This restrictionship can be seen in the semi-arid zone in eastern Inner Mongolia where the ecological condition is limited. Population growth brings unceasingly spread of desertification in eastern Inner Mongolia. Population growth causes a) decrease of average acreage of arable land for each man due to the reclaim of rangeland and abandonment of infertile farmlands;b) blind increase of animal number and over-loading of range-lands;c) insufficiency of energy fuel and d) uncontrolled cutting of herb plant.It is considered that the policy on family planning and birth control is one of the fundamental strategies arid suitable to the national situation in China and it should be carried out continueously. Furthermore, positive measures should be adopted to renew the degraded environment in the de-sertified areas.The improvement of environmental quality and the increase of human population carrying capacity of land are also the positive ways to fifl thegaps amongst the human population, resources and environment, It is suggested that the land use should be changed and its structure for cropping, reafforestating and animal grazing should be reorientated; the proportion of industry, trade and service interprises at small scale should be developed and rain-fed agriculture should be replaced with irrigation; poor management of land should be stopped.

人口、资源和环境之间存在着相互依存、相互影响的关系。对于生态条件有极限的内蒙东部半干旱地区,人口、资源、环境之间的这种制约关系表现得更为明显。由于人口的大量增长,使得内蒙东部沙漠化不断发展。1)人口大量增加,使人均占有土地资源减少,主要表现在草原开垦和撂荒;2)伴随人口增长而盲目增加牲畜头数,使草场超负荷;3)人口的大量增加,造成能源不足,使得当地居民无控制地大量樵柴和掠夺式地砍伐各种植物。作者认为:推行计划生育政策使人口繁殖控制到规划的范围以内是提高环境质量和人口素质的重要对策。除此之外,在沙漠化地区采取积极恢复环境措施 改善环境质量扩大人口载容量也是调整人口、资源、环境之间不协调关系的积极途径。诸如调整农、林、牧结构 扩大工、商、服务业的比重,减少对土地依附性强的农林牧比重,修建水利工程变旱作农田为灌溉农田等。

An analysis has been made on the dynamic relationship among the resources, economy, population, and environment in guizhou Province as a regional ecosystem. The analysis has indicated that the predominant characteristic in the regional ecosystem in Guizhou Province is the degradation of the eccsystem and environment because of inconsistency of economic development and population growth with ecosystem,resources and environment.The mountainous land in Guizhou amounts to 97% of its total area, so the resource...

An analysis has been made on the dynamic relationship among the resources, economy, population, and environment in guizhou Province as a regional ecosystem. The analysis has indicated that the predominant characteristic in the regional ecosystem in Guizhou Province is the degradation of the eccsystem and environment because of inconsistency of economic development and population growth with ecosystem,resources and environment.The mountainous land in Guizhou amounts to 97% of its total area, so the resource of cultivated land is inadequate. Under the stress of the population growth that has been, doubled over the past three decades, however, people have had to extend doubly the area of their cultivated fields, to deforest and to degrass on mountains or hills, and to bring sleep hillsides under cultivation. As a result, the subtropical mountainous forest ecosystem has undergone a severe destruction that leads to a reduction in forest coverage to 12.6% of the total province area. Soil erosion is increasingly heavy and natural disasters such as drought and waterlogging are getting frequent and serious. In addition to this, meanwhile., there has been heavy environment pollution by both industries and mines. For the recent years, the rising up of township enterprises has resulted in pollution spreading throughout the rural area. So far, the- degradation, of the regional ecosystem and environment has become an important obstacle for further economic, development.

本文从区域生态系统的角度,分析贵州省资源、经济、人口和环境之间的动态关系。指出经济、人口的增长和区域生态环境质量退化相对应是贵州省区域生态系统的主要特征,其原因则是经济、人口与资源、环境之间不相适应。贵州省山地占总面积97%,耕地资源十分缺乏。但迫于人口三十余年成倍增长的压力,只能成倍地扩大耕地面积,上山毁林毁草,陡坡开垦,因此造成亚热带山地森林生态系统严重破坏,森林覆盖率下降到12.6%。水土流失、旱、涝等自然灾害日益加重。同时由于工矿发展,又叠加着环境污染。近年,随着乡镇企业的兴起,污染已向农村扩散。目前区域生态环境的退化已成为经济发展的重要障碍和农村贫困的根源。

 
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