We study the influence of birthrate and deathrate, build an infectious disease model, give a solution to the model and analyse the practical significance of the model.
给出了考虑出生率与死亡率影响的一个传染病模型 ,并且给出了模型的解 ,分析了模型的实际意
Objective To investigate and evaluate the causes of perinatal death in recent five years, aim at improving the quality of perinatal health care and reducing the perinatal morbidity.
结果①本院1999年1月至2003年12月围生儿总数为6600,共有40例围生儿死亡,围生儿死亡率为6。
Compare of Sex on Birth Rate and Death Rate of Population in Jingdezhen city;
景德镇市人口出生率与死亡率性别间的比较
the annual birth/marriage/death rate
年出生[结婚/死亡]率
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。
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‰；
In fact, there are some differences between life insurance death rate and death rate in mortality table, and rate of interest taken on randomness.
实际上，寿险死亡率与生命表的死亡率有所差别，利率具有随机性。
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。
"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。
A Delayed SEIR Model with Birth and Death Rate;
具有出生率和死亡率的时滞SEIR模型的研究
Beijing's birthrate was 6.1 per thousand, death rate, 5.3 per thousand, and the natural population growth rate was 0.8 per thousand, down by 0.1 permillage points.
全市人口出生率为6.1‰，人口死亡率为5.3‰，人口自然增长率为0.8‰。
The mortality rate of newborns dropped to 3.7 per thousand.
新生儿死亡率已降至3.7‰。
the death rate during the first year of life.
生命刚开始的死亡率。
Relationship between the Mortality and the Levels of Some Biochemical Indicators in the Acute Stage Patients with Hemorrhagic Stroke;
脑出血患者急性期若干生化指标水平与死亡率的关系
The reason for the rapid increase in population is a rise in birth rate a fall in death rate.
人口的迅速增长与其说是由于出生率的上升，还不如说是由于死亡率的下降。
The reason for the rapid increase in population is not so much a rise in birth rate as a fall in death rate.
译：人口的迅速增长与其说是由于出生率的上升不如说是由于死亡率的下降。
High birth rates were often balanced out by high death rates.
高生育率常被高死亡率抵消。
This is not only due to high birth rates, but to lower death rates as well.
这不仅仅是由于出生率高，而且还由于死亡率低的缘故。
population explosion( sudden increase in populationresulting from an increased birth-rate and/or a reduced death-rate)
人口爆炸（由于出生率上升和[或]死亡率下降而引起的人口急剧增加）.