replacement level

Furthermore , around 50 % of the world 's population live in regions where the figure is now below the replacement level ( i.e.2.1 births per woman ) and almost all developed nations are experiencing sub-replacement birth rate ．

此外,约50%的世界人口生活在目前这一数字低于更替水平（即每名妇女生育2.1个）的地区,几乎所有发达国家都在经历次更替以下的出生率。

Japan has a birth rate the average number of children a woman has in her lifetime of around 1.4 , far below replacement level .

日本的出生率每个女人一生中拥有孩子的平均数量在1.4上下，远低于更替水平。

Study on the Rational Replacement Level of Ultra-fine Fly Ash in Prestressed High Performance Concrete Beam

预应力高性能混凝土梁中超细粉煤灰合理掺量研究

There was a good super-composite effect between steel slag and blast furnace slag at high replacement level and their optimal proportion was 3:7 .

高掺量下钢渣与矿渣有良好的复合超叠加效应，且二者的最佳比例为3∶7。

Results show that the ratio of hardness of matrix to that of interface transition zone decreases with the increase of cement replacement level by blast furnace slag ;

试验结果显示：随矿渣取代水泥质量分数的增加，基体与界面过渡区之间压痕硬度的差异减少；

The total fertility rate had been 5.8 in 1950 , he notes , and had declined sharply to 2.3 by 1980 , just above replacement level .

他解释说，1950年总生育率为5.8，而1980年巨幅下降至2.3，略微高于人口更替水平的底线。

The results showed that influence of steel slag on workability was different at different replacement level and composite mineral admixture containing steel slag and blast furnace slag decreased workability of concrete .

研究结果表明，不同掺量下钢渣对混凝土工作性能的影响不同，钢渣-矿渣复合掺合料对混凝土的工作性能有明显不利影响；

Fertility transition has been very rapid since China carried out the economic reform , and fertility has dropped to below replacement level since 1992 when China directed the reform on establishing a market economy .

自改革开放以来，我国人口生育率水平出现了迅速的转变，特别是1992年我国确立了市场经济为目标的经济改革以来，生育率水平更是进一步降低到更替水平以下。

Although there was a short period of population compensation and the fertility had risen , till the 1970s , the fertility rates have fallen below the Replacement Level , respectively .

尽管第二次世界大战后曾出现过短暂的人口补偿现象，生育率有所回升，但20世纪70年代各国生育率都先后下降到生育更替水平以下。

LeBron was 26 when he left a thoroughly replacement level Cavaliers " rosters in 2010 to join Wade and Bosh with the Heat .

26岁的勒布朗在2010年和韦德，波什一起加入热火时，骑士的阵容一塌糊涂。

There is no disadvantage effect of the alkali in natural zeolite on restraining alkali-silica reaction , when the replacement level of cement by natural zeolite is more than a certain quantity .

当沸石达到一定掺量以上时，沸石中的碱并不影响其对碱硅酸反应的抑制作用。

In this article , authors define stabilizing low fertility rate , argue that low fertility rate is equal to or even lower than replacement level fertility over a long historical period in 21 st century .

作者对稳定低生育水平进行了界定，认为在21世纪一个相当长的历史时期内，定义低生育水平为等于或低于更替生育水平。

A assumed completely filled principle is proposed according to the definition of rational sand rate . A theoretical calculating formula to calculate the rational replacement level of crushed stone fines in mixed sand is obtained according to this principle .

根据合理砂率的定义，类似地提出了混合砂假定填满原则，并根据该原则计算得到了机制砂合理掺量的理论计算式，以及混合砂混凝土的合理砂率计算式。

Guangdong is a province with the largest migration and floating population in China , what is more , the population has been in a low fertility stage , for the total fertility rate has been under the replacement level for 10 years .

广东省不但是全国人口流动和迁移最活跃的省份，而且人口总和生育率已连续10年低于更替水平，进入低生育水平时期。

The survey found Qingzhou City , married women of childbearing age will planning ideal number of children close to replacement level fertility policy , and allowed the birth of the number of children there is a gap , but also far higher than the actual level of fertility .

青州市已婚育龄妇女的意愿生育理想子女数虽接近于更替水平，但与生育政策允许生育子女个数存在较大差距，也远远高出限制政策下的实际生育水平。

It was studied that the effects of water binder ratio , replacement level of ultra-fine fly ash and sand ratio on early mechanical properties of steam-cured concrete with different coarse aggregates ( crushed stone and crushed gravel ), including compression strength , prism strength and elastic modulus .

研究了水胶比、超细粉煤灰掺量和砂率对不同粗骨料（碎石和碎卵石）蒸养混凝土早期力学性能的影响，主要包括抗压强度、棱柱体强度和弹性模量。

Linux also supports protocols such as the Stream Control Transmission Protocol ( SCTP ), which provides many advanced features above TCP ( as a replacement transport level protocol ) .

Linux也可以支持诸如流控制传输协议（SCTP）之类的协议，它提供了很多比TCP更高级的特性（是传输层协议的接替者）。

The experiments results showed the low level of limestone replacement of the high level limestone in new stem method kiln adapt to the technique requests for familiar material quality by optimizing the components of material and modify the parameter during cement production .

通过低品位石灰石在新型干法窑上的实验，采用低品位石灰石替代优质石灰石，选熟料质量较高，达到了项目要求的技术指标。

Before scholars study the pension replacement rate mostly from models under highly idealized assumptions , thus establish an adequate level of pension replacement rate . But starting from the specific economic environment , this paper theoretically analyzes consensual replacement rate level .

之前学者对养老金替代率的研究大多是从高度理想化的假设条件下建立模型确立养老金替代率的适宜水平，而本文是由具体的经济条件出发，理论分析替代率的合理水平。