demographic transition

常见例句

In Europe and North America this demographic transition began in earnest around 1870.
在欧洲和北美这个人口过渡开始于1870年左右。
In China family planning policies had “accelerated the process of demographic transition”.
在中国，计划生育政策“加速了这种人口过渡过程”。
To assess the effects of the demographic transition, the two researchers split the sample into women born before 1870 and those born in or after it.
为了评估人口过渡的影响，这两名研究员分头对在1870年前和在这时及之后进行生产的妇女进行取样。

The demographic transition, according to this analysis, is a shift from r-type to K-type behaviour.
ECONOMIST: Why, as people get richer, do they have fewer children?
And that does not include any benefits that might come from the demographic transition.
ECONOMIST: Vaccination
This is because such countries have moved furthest along the demographic transition from poor, high-fertility status to richer, low-fertility status.
ECONOMIST: African child mortality