population decrease的例句大全

There has been a progressive decrease in population every year in this city.

这个城市的人口在逐年递减.

With the decrease of genotype entropy, the genetic diversity degree of population also decreases.

随着基因型信息熵的减少,群体的遗传多样性程度也越来越小.

There was a 9.97 % ～67.1 % decrease in the population of LC after UVR.

表皮内LC密度降低,细胞数较照射前减少9.7%～67.01%.

Simulation experiments on the compensation of cotton population to the decrease of plant number caused by black cutworm

小地老虎为害棉苗缺株产量损失及棉株群体补偿力模拟试验

But only enlarge population size, it will decrease breeding efficiency and population multiple breeding gain, we should enlarge breeding flock size and active breeding flock proportion in practice. 5.

育种投入平均减少22.97%，但单一加大群体规模，随着留种公羊数的增加，将降低育种效益和综合遗传进展，在育种实践中应尽量扩大育种群规模和主动育种群比例。

When proportion of breeding flock size is fixed, the population size enlarge every 5000, breeding profit and genetic gain will roughly increase 7.21% and 6.60% respectively, and breeding cost will decrease 22.97%.

在育种群规模比例固定的情况下，群体规模每扩大5000只，育种效益平均增加7.21%，遗传进展平均增加6.60%。

Rapid population growth brought about a lot of negative social and economic results, the most outstanding being a standstill and even a decrease in GDP and food production per capita.

人口增长率过高已造成多方面的不良社会经济后果，其突出表现就是人均GDP和人均食物产量多年停滞不前，甚至有所下降。

It was also the first time Shanghai witnessed a decrease in its permanent population since China adopted the policy of reform and opening-up in 1978, Guo Feng, a research fellow at Shanghai Finance Institute, was quoted by news site wallstreetcn.com as saying on Tuesday.

上海金融学院的研究人员郭峰引用了周二华尔街见闻上的信息并表示，这也是自1978年中国改革开放以来，上海第一次见证了常住人口的减少。

Conclusions Standardized ultrasonographic views in the fetal screening in the second trimester pregnancy is an important procedure in the early identification of fetal abnormalities and reduction of missed diagnosis. This procedure plays an important role in the decrease of perinatal mortality and improvement of newborn population quality.

结论中孕期胎儿超声筛查切面的规范化是早期发现异常胎儿，减少漏诊的重要措施，对减少围产期死亡率，提高出生人口质量具有重要意义。

And the development of ecological agriculture should rely on agricultural production, the decrease of population bearing in unit farmland is key factor to raise productivity and increase farmer'income.

农村生态建设要立足农业，通过减少土地的人口承载量，提高劳动生产率和增加农民收入。

From then on, population suburbanization continuously developed outward, with presence of continuous decrease of population density gradient and shift from abruptness to plainness of Population Density Distribution Curve in term of space.

自20世纪80年代启动以来，上海人口郊区化不断向外推进，在空间上表现为人口密度梯度的不断降低、人口密度分布曲线由陡峭逐渐趋向平缓。

While the population size exceed presetting threshold, the population size decrease to original state. Then, to solve discrete optimization problem, PSO algorithm is modified to discrete one.

当种群规模超过预先设置好的阈值时，将种群规模降为初始状态。（2）为求解聚类问题，将PSO算法修改为离散化PSO。

Natural decrease in Shanghai population and socioeconomic development

上海人口自然变动负增长与社会经济发展

Too many effective spikes or too strong individual dominance may decrease the population yield, but increase the chalky rice rate.

片面强调个体或群体都不利于群体产量提高和垩白粒率降低。

Any increase or decrease in the population of one species may affect all other species on the tundra.

任何一个物种在数量上的增加或减少都会影响到冻土带上所有的其他物种。

Meanwhile, the Chinese working population will start to decrease from 2015.

与此同时，中国劳动人口将从2015年起开始下降。

The survival curve indicated that the population decrease uses mainly from egg to lst and 2nd instar.

从种群存活曲线分析得出，影响种群增长的关键虫期为卵至1、2龄幼虫期；

Conclusion: Interventions in high-risk population can decrease the infection rate of chlamydia.

结论：通过对高危人群进行干预，可降低衣原体在女性生殖系统的感染率。

The results show that under otherwise equal conditions the absolute values of edge effect in plant population progressively decrease as the horizontal edge distance progressively increase.

结果表明：在同一条件下，植物群体边缘效应的绝对值随水平边距递增而递减。

With the increase of population and decrease of petroleum output in Daqing area, the change of land use is more notable and the intensity of land use is more strengthened, which lead to the land deterioration, soil and water pollution, bio-diversity decreased.

随着人口增长和石油产量的逐年降低，大庆市对土地利用模式的改变及对土地利用强度的加大，导致土地退化，土壤污染，水污染加重和生物多样性降低等后果；