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.
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.
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