Birth rates are notoriously difficult to predict.

众所周知，是很难预测的。

The birthrate in the city has been decreasing.

该市的一直持续。

2Mean values of leaf natality(A)and leaf mortality(B).

图2叶(A)和死亡(B)的平均值 Fig.

The birthrate is on the decline.

在。

The birthrate is on the decrease.

人口正在。

The birthrate is down this year.

年。

Increasingly, worried European governments are crafting natalist policies to nudge couples to have more children, from offering better child care to monthly stipends keyed to family size.

渐的，烦脑的欧洲政府正编织政策以推动夫妻有更多小孩，从提供更好的孩童照顾到针对户量的每月津贴。