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the population growth
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  人口增长
     The land use change is mainly caused by the development of the economy and technology, the population growth, the agricultural structure adjustment, the policy and so on.
     通过对土地利用变化驱动力的定性与定量分析,发现经济发展、人口增长、农业结构调整、科技发展、政策等是引起土地利用变化的重要原因。
短句来源
     Discussion of the Population Growth in China
     中国人口增长之探讨
短句来源
     The result shows that population is not granger reason of grain-production,the population growth and grain-production to predict population growth and grain supply and demand of the following 6 years,and proposed some suggestions based on harmonious development.
     结果表明,样本期内人口因素不是粮食生产的Geanger原因,人口增长和粮食生产发展并不协调. 通过建立中国粮食生产模型,预测了2006-2010年的人口增长与粮食生产趋势,提出了实现中国人口增长与粮食生产和谐发展的几点建议.
短句来源
     The Population Growth of Northeast China in Modern Times and Its Impact on the Economic Development
     近代东北人口增长及其对经济发展的影响
短句来源
     It will have much significance to predict the population growth in Yunnan revealed in the following four estimations and analyses, the expected peak of population, the natural population growth, the care-taking responsibilities as well as the socio-economic influence.
     因此预测未来云南人口增长的趋势,并对4个预测方案进行比较和评述,估计云南峰值人口规模、人口自然增长率、人口抚养关系以及人口老龄化等重要人口指标未来变化的可能性,分析与这种变化相关的主要社会经济影响,具有重要意义。
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  种群增长
     The effect of food and initial population density on the population growth of Brachionus plicatilis by the method of orthogonal design as water temperature was at (17.8±1.3) ℃ and (23.3±1.9) ℃ were studied separately.
     应用正交设计方法, 研究了水温分别为(17.8±1.3 )℃和( 23.3±1.9 )℃条件下, 不同饵料和接种密度对褶皱臂尾轮虫(Brachionusplicatilis) 种群增长的影响.
短句来源
     If the alga Scenedesmus obilquus was used as the rotifer's food, the concentration of 6.0×10 6cells/ml was most favorable for the population growth.
     若以斜生栅藻为食物 ,轮虫种群增长的最适浓度为 6.0× 10 6cells/ml.
短句来源
     Indices of population trend (Y) of this species within the range of temperatures (X) studied can be expressed as follows:Y =-2530.285 + 282.1893X - 6.2407X2It is calculated with this equation that the favourable temperature for the population growth is 22.6℃, at which the number of the armyworm will increase about 660 times after one generation cycle.
     种群增长指数可用下述方程表示:y=-2530.2850+282.1893X-6.2407X~2在最适温度(22.6℃),繁殖一代,种群数量约增加660倍。
短句来源
     The result showed that the temperature available for the population growth was 26~30 ℃.
     结果表明,适于苹果全爪螨实验种群增长的温度在26~30℃。
短句来源
     2) All the food and the initial population density brought the marked influence for the population growth when the water temperature was at (17.8±1.3) ℃. The food also had the marked influence for the population growth,but the initial population density had not obvious effects for that when water temperature was at (23.3±1.9) ℃.
     2) 当水温为(17.8±1.3)℃时, 饵料和接种密度均对轮虫种群增长具显著影响, 水温为( 23.3 ±1.9)℃时, 饵料对轮虫种群增长具显著影响, 而接种密度对种群增长影响不显著;
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  人口数量增长
     Therefore, in order to coordinate China man land relationship and promote the national sustainable development, it is necessary to positively explore the oceanic space, promote scientific and technical progress, improve the public education and health, control the population growth, change the traditional consumption model, heighten the resources utilizing efficieney, reduce the wastes, protect the biodiversity, strengthen the environmental management and construction, lighten the damage of natural disasters
     目前,我国的人地关系态势是资源需求日益增长、承载力损失逐年加大、人地关系矛盾日趋尖锐,因此,积极开发海洋空间、促进科学技术进步、改善公众教育与健康、控制人口数量增长、改变传统消费模式、提高资源利用率、减少废弃物排放、保护生物多样性、加强环境治理与建设、减轻自然灾害,是协调我国人地关系、实施可持续发展战略的必然选择
短句来源
     The population growth should be under control and the people's quality shouldbe improved so that the population growth can coordinate the economic development. Only in this way can we promote thesustained economc development of developing countries and the world.
     发展中国家应该把握人口增长与经济社会发展的内在联系,控制人口数量增长,提高人口素质,使人口增长与经济发展相协调,促进发展中国家以及世界经济的可持续发展。
短句来源
     The main population problems to be faced with in the following 20 years can be summarized as the following eight respects: to control the population growth and stabilize the low-fertility level;
     未来20年面临的主要人口问题可概括为八个方面:控制人口数量增长,稳定低生育水平;
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     At last,we get the main influence causes on whole Yutian,which is the population growth,livestock growth and firewood fell.
     结果表明:20世纪90年代以来,于田县人口数量增长是研究区LUCC最主要影响因素,其次是牲畜头数的增长以及采樵量的变化。
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  “the population growth”译为未确定词的双语例句
     At the same temperature,the relationship between the time and the population growth rate were curvilinear,with the following regression equation:Y=0.000433X~2-0.00262X+0.00332(10℃),Y=-0.003367X~2+0.068335X-0.066489(20℃),and Y=-0.018469X~2+0.188952X-0.030933(30℃).
     在同一温度下,种群增长率均与时间呈曲线相关,10℃、20℃、30℃的回归方程分别为:Y=0.000433X2-0.00262X+0.00332、Y=-0.003367X2+0.068335X-0.066489、Y=-0.018469X2+0.188952X-0.030933。
短句来源
     The relationships between the temperature and the population growth rate of both QD and GZ strain were curvilinear, with the regression equation Y= 0.0009X2 - 0.0061X + 0.4090 and Y= - 0.0144X2 + 0.7412X - 8.3751, respectively.
     青岛品系和广州品系的种群增长率均与温度呈曲线相关,回归方程分别为:Y= 0.0009X2 - 0.0061X + 0.4090和Y= - 0.0144X2 + 0.7412X - 8.3751。
短句来源
     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
     0.64 mg·L~(-1) DDT significantly decreased the population growth rate.
     当DDT浓度达0.64 mg·L~(-1)时,轮虫种群增长率显著降低;
短句来源
     The relationship between the population growth rates of them and the food concentrations were curvilinear, and it could be described as Y=-0.004X2+0.0409X+0.4471 and Y= - 0.0024X2 + 0.0098X + 0.4385, and the maximum population growth rates of B. rubens and B. urceolaris are 0.5517d-1 and 0.4685d-1, respectively.
     红臂尾轮虫和壶状臂尾轮虫的种群增长率与食物浓度之间均呈曲线相关,相应的回归方程分别为:Y= - 0.0040X2 + 0.0409X + 0.4471和Y= - 0.0024X2 + 0.0098X + 0.4385;
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  the 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.
      
The population growth experiments were terminated after 19 days.
      
The population growth rate and the elasticity of the survival and reproduction parameters have been determined analytically.
      
Throughout the population growth study, peak population abundance values of D.
      
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The present paper deals mainly with the fluctuations of the mixed population of 4cotton mirids, viz. Lygus lucorum Meyer-Dhr, Adelphocoris fasiaticollis Reuter, A. lineo-latus Goeze and A. suturalus Jak. Observations were made continuously in the cottonand alfalfa fields through-out the years 1954-1961 in Shensi. The relationships betweenthe mixed population and the populations of the four species were also compared. It is seen that the growth form of the mixed population of the cotton mirids may beinfluenced...

The present paper deals mainly with the fluctuations of the mixed population of 4cotton mirids, viz. Lygus lucorum Meyer-Dhr, Adelphocoris fasiaticollis Reuter, A. lineo-latus Goeze and A. suturalus Jak. Observations were made continuously in the cottonand alfalfa fields through-out the years 1954-1961 in Shensi. The relationships betweenthe mixed population and the populations of the four species were also compared. It is seen that the growth form of the mixed population of the cotton mirids may beinfluenced by the amounts and temporal distribution of rain-fall from June to August. Ac-cording to the position of the peak the population growth form may be divided intofour types: 1. Pre-peak type 3. Mid-peak type 2. Post-peak type 4. Bi-peak type On the basis of these different types of growth form, the temporal characteristicof damages in the growing season caused by the mirids could be clearly seen: Pre-peak type——damage mainly in the square period. Post-peak type——damage mainly in the boll period. Bi-peak type——damage in both the square and boll periods. Mid-peak type——slight damage in both the square and boll periods. The limiting factors for the fluctuations of the mixed population were also analyzed.The results showed that the population fluctuations in the square period were closelyrelated to both the amount of rain-fall in June and the basic populations in the alfalfafields in the early spring. But in the boll period the combined effect of temperatureand humidity played a more important role in checking the population of mirids. For convencience, three predictive formulae for the square and boll period have beensuggested in the following table:

本文以陕西关中棉区发生普遍,为害严重的绿盲爆(Lreu。l。ocr。m Mever-DQr)、首稻育馆(A人如加c。r订U。。。b拙。G。ez一、三点盲蝽(A.fasiaticollis Reuter)和中黑盲蝽(A.s。。tuturalus Jak.)四种盲蝽为对象,进行了数量变动的研究与分析。 文中依据生态特性的研究结果,结合8年的田间观察资料,对棉田内四种盲蝽混合种群与单种种群的消长曲线分别进行了分析与比较,根据分析结果,文中采用了盲蝽混合种群作为分析的对象,并提出棉田内盲蝽混合种群的消长曲线是受蕾铃期间降水量与降水期的影响,根据降水量与降水期的不同,其曲线变动可分为四个波动型,即前峰型、中峰型、后峰型与双峰型。由于峰型不同,即表示着该年的旱涝分布与棉株受害程度与阶段的不同,前峰型属前涝后旱型,亦即蕾期为害型:后峰型属前旱后涝型,亦即铃期为害型;双峰型属涝年型,亦即蕾铃两期为害型;而中峰型则属旱年型,亦即蕾铃两期受害均轻型。 文中依据棉株不同生长阶段中影响盲蝽种群数量变动的主导作用因素的分析结果,提出分析棉田盲蝽种群的变动应分为蕾期与铃期两阶段,由于棉株生长阶段不同,在这两阶段中影响盲蝽的主导作用因素亦...

本文以陕西关中棉区发生普遍,为害严重的绿盲爆(Lreu。l。ocr。m Mever-DQr)、首稻育馆(A人如加c。r订U。。。b拙。G。ez一、三点盲蝽(A.fasiaticollis Reuter)和中黑盲蝽(A.s。。tuturalus Jak.)四种盲蝽为对象,进行了数量变动的研究与分析。 文中依据生态特性的研究结果,结合8年的田间观察资料,对棉田内四种盲蝽混合种群与单种种群的消长曲线分别进行了分析与比较,根据分析结果,文中采用了盲蝽混合种群作为分析的对象,并提出棉田内盲蝽混合种群的消长曲线是受蕾铃期间降水量与降水期的影响,根据降水量与降水期的不同,其曲线变动可分为四个波动型,即前峰型、中峰型、后峰型与双峰型。由于峰型不同,即表示着该年的旱涝分布与棉株受害程度与阶段的不同,前峰型属前涝后旱型,亦即蕾期为害型:后峰型属前旱后涝型,亦即铃期为害型;双峰型属涝年型,亦即蕾铃两期为害型;而中峰型则属旱年型,亦即蕾铃两期受害均轻型。 文中依据棉株不同生长阶段中影响盲蝽种群数量变动的主导作用因素的分析结果,提出分析棉田盲蝽种群的变动应分为蕾期与铃期两阶段,由于棉株生长阶段不同,在这两阶段中影响盲蝽的主导作用因素亦不同,蕾期的虫口增长是受早春虫口基数与6月降水量两因素联合作用的结果,而铃期的虫口增长则系受温湿度组

Sichuan province has a population of 99713310, which makes up about 9.7% of China's population, and ranks first above all the provinces in China, The population of Sichuan Province is characterised by large cardinal number, predominant farming population, high population density and great increase rates,The geographical distribution of the population in Sichuan province has the following laws. Eastern Sichuan has more population than western Sichuan, The population in plains and hilly lands is greater than that...

Sichuan province has a population of 99713310, which makes up about 9.7% of China's population, and ranks first above all the provinces in China, The population of Sichuan Province is characterised by large cardinal number, predominant farming population, high population density and great increase rates,The geographical distribution of the population in Sichuan province has the following laws. Eastern Sichuan has more population than western Sichuan, The population in plains and hilly lands is greater than that in mountains and plateans. The population in citjes and towns is greater than that in the countryside. Such a population distribution in space is resulted from the interaction of such factors as physical geography, society, economy, history and nations. In view of the large population in Sichuan province, the author suggests that it is mecessary to control the population growth.

四川人口达99713310人,占全国的9.7%,居全国各省(区)的第一位。四川人口具有基数大、农业人口为主、人口密度较高和增长速度快等特点。四川人口地理分布东部多于西部,平原和丘陵多于山地与高原。四川人口空间的成因是自然地理、社会经济和历史民族因素共同作用的结果。

Selenothrips rubrocinctus (Giard) is an important pest of tung-oil tree Aleuritis fordii in southern China. In middle May overwintered adults begin to appear on tung-oil tree in Hunan Province and lay eggs in slits of leaves cut by ovipositor. About eight overlapping generations may occur before leaves fall. From May to October the duration of life cycle is about 20 to 30 days. Before August the population gradually grows and in the late September and October it increases sharply, soon reaching the peak, causing...

Selenothrips rubrocinctus (Giard) is an important pest of tung-oil tree Aleuritis fordii in southern China. In middle May overwintered adults begin to appear on tung-oil tree in Hunan Province and lay eggs in slits of leaves cut by ovipositor. About eight overlapping generations may occur before leaves fall. From May to October the duration of life cycle is about 20 to 30 days. Before August the population gradually grows and in the late September and October it increases sharply, soon reaching the peak, causing serious damage to host plants and reducing tung-oil production. Its population decreases rapidly thereafter in response to the lower temperature and less favorable food. Warm and dry weather favours the population growth. Population abundance in thin stand is more copious than that in thick stand. A. fordii is the most preferred host plant while A. monotana is almost immune to its attack. Raising the resistance of the tree toward the pest, rational close planting and painting the trunk with 40% Rogor in August have been proven to be effective for suppressing pest outbreak.

红带滑胸针蓟马Selenothrips rubrocinctus(Giard)为我国油桐的重要害虫。一年可发生6—8代,6—9月约20—30天完成一代。6—10月种群数量不断上升,尤以9—10月增殖幅度极大,是一年中为害最重的时期,造成早期落叶,影响碳水化合物转化为油脂,并削弱来年树势。高温干旱有利于此虫的发生,低温高湿不利其发生。三年桐是其喜食寄主,千年桐几乎是免疫的。加强桐林培育,适当密植提早郁闭及以40%乐果原液涂树干是防治此虫的可行而有效办法。

 
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