fertility rate

Nugent says statistics on the fertility rate were also revealing.

Nugent说 人口出生率的统计数据也揭示了这一点.

China's fertility rate now averages 1.8, less than replacement.

中国生育率平均为1.8, 远远低于人口替换率.

the important factors affecting total fertility rate are economic development level, the general fertility rate, the child-bearing age and the level of urbanization.

影响中国总和生育率的主要因素有经济发展水平、一般生育率、生育年龄和城镇化进程等。

Unfortunately , the same cannot be said about measures to raise the fertility rate.

要生育率回升,方法似乎不多.

The fertility rate, 1.74 in 1980 a bit later in that decade, but has fallen since.

1980年, 该国生育率为1.74,在此后10年间,略有增长, 但之后又降下去了.

Fertility rate is in positive proportion to hatchability of fertile eggs. Its relevant coefficients is 0.2978 ( p < 0.01);

受精率与孵化率呈现正相关，相关系数为0.2978（p

Results: The female health of Chinese minorities has improved universally during 1990-2000. The female health is correlative with the female mortality, the average GDP, the primary marriage age, the birthrate, the total fertility rate, et al.

结果：1990年到2000年我国少数民族育龄妇女健康状况普遍提高，育龄妇女死亡率与人均GDP、初婚年龄、出生率、总和生育率等有相关性。

A fertility rate of around 2.1 is considered the level a population can replace itself.

1左右的生育率被认为是人口可以自我更新的合适水平.

The results suggests, coated materials M2 was better than coated materials M1 in controlling nutrients release rate. The experiment was conducted to study on nutrients release and movement and soil fertility applied by humid acid ( HA) compound fertilizer.

结果表明，膜材料M2的控释性能优于膜材料M1；采用盆栽试验与室内土柱模拟试验方法，研究了腐植酸复合肥中的养分在土体中的释放运移特点以及对土壤的培肥效应。

We discuss the entire solution of the time-dependent population developing system equation. We regard the noncompetitive fertility rate as control function and judge its optimality by quadratic functional, and study the optimal control problems for the above population system.

讨论了时变人口发展系统的整体解，并且将非竞争人口生育率作为控制函数，用二次泛函来判别其最优性，研究了上述人口系统的控制问题。

The fertility rate of the former and latter within 100 days were more than 60% ( 45/ 75) and 40% ( 28/ 69) respectively.

试验组母牛在产后100天内的受胎率为60%（45/75）；

Based on this framework, the government intervention policies of population reproduction is assessed in terms of their effectiveness in reducing fertility rate, controlling total population size, increasing population quality and standard of living, lessening population pressure, and promoting economic growth.

实行人口再生产干预的非均衡政策，确保在低生育率水平下对人口进行总量控制，全面提高中国的人口素质和生活质量，降低人口压力综合指数，促进人均经济增长。

China's Fertility Policy Adjustment in Low Fertility Rate Time: Based on an Analysis of the Socio-economic Negative Effects of Low Fertility Rate

低生育率时代的中国生育政策调整&基于对低生育率社会经济负效应的分析

Studies on the influence of high effect sperm diluter on fertility rate in breeding bird egg

鸡高效精液稀释液对种蛋受精率影响的研究

Review the relative theories of the birth sex rate and theoretical research on relative elements such as number of birth, numeral of mother's fertility, fertility rate, fertility policy, statistic quality, fertility culture, marriage opinion and management.

回顾了出生性别比相关理论以及与出生性别比有关的因素如出生数量、出生孩次、生育率、生育政策、统计质量、生育文化、婚嫁观念、管理等因素的理论研究。

And the urban population, life expectancy at birth, adult literacy rate and the enrollment rate of high education are rising, and also the infant mortality rate, population growth rate and total fertility rate are declining.

城市化、预期寿命、成人识字率和大学普及率等在提高，婴儿死亡率、自然增长率和总和生育率等在降低；

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。

The fertility rate in the EU is 1.47— well below replacement.

欧盟的生育率为1.47——刚好低于替代出生率.

This paper presented two fertility rate models, i. e., lognormal distribution model and Poisson distribution model.

文中介绍了对数正态分布模型和泊松分布模型，在此基础上构造了生育率组合模型。

The Optimal Control on the Noncompetitive Fertility Rate for the Time-dependent Population Developing System

时变人口发展系统非竞争人口生育率的最优控制

The fertility rate of this group is 67%.

怀孕率占67%。

From Lowering Fertility to Stabilizing Low Fertility: a Research on Factors Associate with Fertility Rate and Policy Implications in Context of Negative Natural Increase in Shanghai

从降低生育率到稳定低生育率&自然负增长背景下的生育率影响因素及生育管理研究

The thesis makes use of demographic transition theory to describe population reproduction modernization, explains the causes of fertility rate declination and sets up the analyzing model, and then suggests that we should use "golden age structure" in population reproduction to promote economic development.

对生育率下降原因进行了综合描述并给出分析模型；提出要利用人口再生产类型现代化过程中的黄金年龄结构机遇实现经济起飞和提速；

The results showed that the fertility rate, hatchability of fertile eggs and hatching eggs of ⅱ were the highest, being ⅲ,ⅳ,ⅰ in proper order.

结果表明，Ⅱ组种蛋受精率、受精蛋孵化率及入孵蛋孵化率最高，其余依次为Ⅲ组、Ⅳ组、Ⅰ组。

China will also have an ultra-low fertility rate after 2026 and that the government should start encouraging families to have more children.

2026年以后中国也将面临超低生育率，政府将开始鼓励家庭生育更多的孩子。

The women's educational level can be involved into certain factors like birth idea, family structure, first marriage age, employment status to influence the fertility rate.

分析表明，妇女文化程度与其平均活产子女数呈负相关关系，并且妇女文化程度通过生育观念、家庭结构、初婚年龄、就业状况等因素对生育率产生影响。

Their work includes the identification of genes which govern the growth rate and fertility

他们的工作包括找出那些控制生长率和繁殖能力的基因。

When freezing single testicular spermatozoa, cryoprotectant-free vitrification was safety, economical and effective, and the fertility rate was similar to fresh sperm in ICSI.

采用不加冷冻保护剂的玻璃化法冷冻保存微量睾丸精子是一种安全、经济、有效的冷冻保存方法，冷冻复苏后采用ICSI技术可取得与新鲜精子相似的受精率。

Their work includes the identification of genes which govern the growth rate and fertility.

他们的工作包括找出那些控制生长率和繁殖能力的基因。

Some results on the critical value of variable specific fertility rate with time

关于时变总和生育率β（t）的临界值的几个结果