第一阶段:传统社会,人口增长率较低 Traditional society with lower growth rate of population ·第二阶段:经济成长阶段。死亡率逐渐下降,出生率居 高不下 economic growth stage with decreasing mortality gradually and high birthrate ·第三阶段:国家经济高度发达。人口增长率不断下降, 人口绝对数缓慢增长 high developed national economy with decreasing growth rate of population 第四阶段:生育率控制在略高或等于死亡率的水平,基 本平衡。人口增长趋近于零 Birthrate is controlled at a little bit higher or equal level of mortality, keeping balance, so the growth rate tend to zero7 • 第一阶段：传统社会，人口增长率较低 Traditional society with lower growth rate of population • 第二阶段：经济成长阶段。死亡率逐渐下降，出生率居 高不下 economic growth stage with decreasing mortality gradually and high birthrate • 第三阶段：国家经济高度发达。 人口增长率不断下降， 人口绝对数缓慢增长 high developed national economy with decreasing growth rate of population • 第四阶段：生育率控制在略高或等于死亡率的水平，基 本平衡。人口增长趋近于零 Birthrate is controlled at a little bit higher or equal level of mortality, keeping balance, so the growth rate tend to zero