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.
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.
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.
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.
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.
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.
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.
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