根据现有的出生率和死亡率，我们能预见下地狱人数会成幂数型增长。
With the birth and death rates what they are, we can expect the number of souls in Hell to increase exponentially.
这是出生率与死亡率平衡的问题。
2003年，报道称该地区的死亡率已经超过了出生率，比例高达260%，男人平均寿命为42岁，女人47岁。
In 2003, the death rate in the area was reported to exceed the birth rate by 260 percent, and the average life expectancy was reported to be 42 years for men and 47 for women.
但这一地区的多数国家都经历过这方面的灾难。同其他情况相比，出生率更低而死亡率更高。
But much of the region has experienced a calamity in this respect, with many fewer births and many more deaths than would otherwise have been the case.
人类过去掉入高出生率和高死亡率的陷阱，而现在逃到了低出生率和低死亡率的自由之地。
Humanity was once caught in the trap of high fertility and high mortality.
第二个模型基于SEIR模型，考虑了网络蠕虫出生率和死亡率的影响。
The second one, based on the SEIR model, considers the birth rate and death rate of Internet worms.
默里博士表示，相比于低出生率，中国婴幼儿死亡率“迅猛下降”更多是因为有了新的财富。
China's "blistering rate of decline" in child mortality resulted more from new wealth than from low birthrates, Dr. Murray said.
衡量人口的指标通常有出生率、死亡率以及人口增长率等。
There are always some indexes such as the birth rate, the death rate and the growth rate to measure the population.
上海，死亡率高于出生率现象已经持续10之九，并且不足30%的独生子家庭打算要第二胎。
In Shanghai, the death rate has outstripped the birth rate for more than 10 years, and less than 30 percent of couples both from only-child families have had a second child.
两类国家的出生率和死亡率显著不同。
Both birth and death rates are strikingly different between the two groups of countries.
例如，出生率会等于死亡率，而商品生产率也会等于折旧率。
Birth rates must equal death rates, and production rates of commodities must equal depreciation rates.
增长率、出生率和死亡率都决定于若干因素。
The rates of growth of births and deaths will depend a number of factors.
多数国家用“出生率”和“死亡率”之类的术语来界定其人口增长率。
Most countries use such terms as "birth rate" and "death rate" to define the growth rate of their populations.
现在尽管出生率没有大的变化，但由于诸多进步，死亡率却大幅度下降。
Today, although the birth rate has not changed significantly, the death rate has been lowered considerably by various kinds of progress.
如果种群参数如出生率和死亡率随种群密度的变化而变换，就可以说是密度制约的。
Population parameters such as birth and death rates which vary with density are said to be density dependent.
人口增长的主要原因与其说是出生率的上升，不如说是由于医疗进步带来的死亡率下降。
The chief reason for the population growth isn't so much a rise in birth rates as a fall in death rates as a result of improvements in medical care.
结果表明：妇幼卫生合作项目工作在控制人口出生率，降低5岁以下儿童死亡率，尤其是降低婴儿及新生儿死亡率方面卓有成效。
The results showed that the birth rate and the mortality of children under 5 years old were decreased especially for infants and neonates.
人口增长的主要原因不是由于出生率的上升和死亡率的下降，而是因为医疗条件的改善。
The main reason for the population growth isn't so much a rise in birth rates as a fall in death rates as a result of improvements in medical care.
目前，出生率上升，死亡率下降，因此世界人口数量正以惊人的速度增长。
The present birth rate is increasing and the death rate is decreasing. Therefore, the world's population is growing at a frightening pace.
如果出生率和死亡率不随密度的变化而变换，则是非密度制约的。
Birth and death rates that do not change with density are density independent.
如果出生率和死亡率不随密度的变化而变换，则是非密度制约的。
Birth and death rates that do not change with density are density independent.
应用推荐