The difference of birth rate and the rule of it changes in Xinjiang;
新疆人口出生率的差异及其变动特征解析
Based on demographic data from 1427 to 1971 from a Chinese (Hans) family tree and circular distribution analysis, the authors show that the highest male birth rate was 16.
据 1 42 7～ 1 971年汉族家谱和圆形分析 ,表明男婴出生率亥时最高 ,申时最低 ;女婴出生率子时最高 ,戌时最低 。
The birth records of twins in 1989 in China were used to analyze the effects of difference between urban and rural areas on the birth rate of opposite-sex twin (OSTBR) at different maternal childbearing age.
结果表明 ,中国城乡异性双生子出生率与母亲生育年龄变化模式相似 ,城乡差异对异性双生子出生率有明显的影响。
New classic economics explanation for regional differences of human fertility;
人口出生率地区差异的新兴古典经济学解释
The birth rate have fall to twelve per hundred.
出生率下降到12％。
The birth rate is the number of births compared to the number of the people.
出生率是出生数与人口数的比率。
The war brought about a reduction in the birth-rate.
战争导致出生率下降.
The birthrate is on the decrease.
人口出生率正在下降。
International Fertility Societies
国际人口出生率学会
ferility control program
人口出生率控制计划
International Fertility Associatio
国际人口出生率协会
The graph shows a bulge in the birth rate.
图表显示出生率的暴增。
the proportion of births to the population
相对于人口数的出生率
analysis of international variations in birth rates
国际间出生率差异分析
Both birth and death rates are strikingly different between the two groups of countries.
两类国家的出生率和死亡率显著不同。
The rates of growth of births and deaths will depend a number of factors.
增长率、出生率和死亡率都决定于若干因素。
Birth rates must equal death rates, and production rates of commodities must equal depreciation rates.
例如，出生率会等于死亡率，而商品生产率也会等于折旧率。
The fertility rate in the EU is1.47- well below replacement.
欧盟的生育率为1.47——刚好低于替代出生率。
The year 1998 saw 19.91 million births with a crude birth rate of 16.03 per thousand, and 8.07 million deaths, representing a crude death rate of 6.50 per thousand.
全年出生人口1991万人，出生率为16.03‰；死亡人口807万人，死亡率为6.50‰；
But the evidence does suggest there is a mismatch between desired and actual fertility.
但是，确实有证据显示渴望出生率与实际出生率之间存在着错位。
The birthrate in this city is increasing at a ratio of 0.6 to a thousand every year.
这个城市的出生率以每年千分之0．6的比率上升。
"When the birth-rate increases and the death rate drops, the population increases."
当出生率上升,死亡率下降时,人口就会增加。