demographic transition

常见例句

In Europe and North America this demographic transition began in earnest around 1870.
在歐洲和北美這個人口過渡開始於1870年左右。
In China family planning policies had “accelerated the process of demographic transition”.
在中國，計劃生育政策“加速了這種人口過渡過程”。
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.
爲了評估人口過渡的影響，這兩名研究員分頭對在1870年前和在這時及之後進行生産的婦女進行取樣。

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