population rate的例句大全

Conclusion The important elements of population dynamics were the population age structure, the pregnant rate, the reproductive indices and the population number of other species ( little Chinese jird, northern three-toed jerboa and striped hamster).

结论影响种群数量变动的主要因素有种群年龄组成中幼年组的百分比、怀孕率、繁殖指数以及该地区子午沙鼠、三趾跳鼠和黑线仓鼠的数量。

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。

Direct method was used to standardize population injury rate.

人群伤害发生率的标化采用直接法。

The changes of all Chinese Ethnic Groups' Illiterate Population and Illiteracy rate

中国各民族文盲人口和文盲率的变动

Millions of middle-aged1 singles in Japan still live with their elderly parents and depend on them financially, research has revealed, contributing to the county's falling birth rate and ageing population.

调查显示，日本有数百万中年单身族依然与年迈的父母同住，并在经济上依赖父母。这加剧了日本出生率的下降和老龄化负担。

With its rapidly ageing population and falling fertility rate, China is facing a pensions crisis.

随着人口快速老龄化和出生率的下降，中国正面临一场养老金危机。

These include an ageing population and a slowdown in the rate of productivity growth in emerging markets.

它们还包括人口老龄化以及新兴市场生产率增速放缓。

Study on the innate growth rate of Zhuang population

广西壮族人口自然增长力的初步研究

Recent decreased birth rate reach to this population aging in Japan.

近年来下降的出生率助长了日本人口老龄化问题。

Conclusion The detection rate of major risk factors is higher among middle aged population at Shuangliu International Airport, and it is important and urgent to strengthen the prevention and control of cardiovascular diseases.

结论双流国际机场中年人群各种心血管主要危险因素检出率较高，提示尽快加强心血管病防治工作的重要性和紧迫性。

A 30 day field tests with chlorpyrifos bait gave a 66.7% rate of a termite population control on a dam.

其中毒死蜱毒饵在为期30d的水坝白蚁诱杀防治中取得最高（66.7%）的防治效果。

With increasing seeding rate, population quality gradually decreased.

随着播种密度的增加，群体质量呈下降趋势。

Natality and yearly increase rate of the deer population decreased year by year as the population size increased.

种群出生率和年度增长率随种群数量增加而逐年降低，而种群死亡率却有增加趋势。

this paper considers an siri epidemic model that incorporates constant immi-gration rate, excess death of the infected and a general population size dependent contact rate.

讨论一类具有常数迁入率，染病类有病死且有效接触率依赖于总人数的SIRI传染病模型。

The predictions suggest that Britain will see its population increase over the next 40 years at a far faster rate than nearly every other European country.

预测结果显示，在未来40年中，英国人口的增长速度将大大超过欧洲其它国家。

The giant pandas'naturally slow breeding rate prevents a population from recovering quickly from illegal hunting, habitat loss, and other human-related causes of mortality.

大熊猫自然繁殖的比率很低限制了种群的快速恢复，来自非法猎取，产地损失，还有其他人为因素影响死亡率。

Over a lifetime of around 35 years, female pandas typically only successfully raise five to eight cubs, so their slow breeding rate prevents the population from recovering quickly.

一只大熊猫一般能活35年左右，但雌性大熊猫一生中只能成功养育5-8个幼崽。低繁殖率使大熊猫无法快速恢复原有数量。

[ Results] Floating population and returning labour forces from oversea had a lower rate of condom use, 6.3% and 8.8%, respectively, whereas the university students, who confessed their sexual activities, had high rate of condom use up to 74.1%.

[结果]流动人口和劳务输出人员避孕套使用率最低，分别是6.3%和8.8%，而承认有性经历的大学生其避孕套使用率最高达74.1%。

Since the late 1970s, massive and intemperate exploitation of groundwater in the whole irrigation district induced by population explosion and barren land reclaim are the main cause of high rate of soil salinization and sandy desertification.

结果表明，人口膨胀、大面积开荒等导致的大规模、无节制地开采地下水，造成地下水水位下降、水质恶化，是30多年来民勤盆地土壤盐碱化、沙漠化迅速发展主要原因。

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。