Birth rates are notoriously difficult to predict.

众所周知，出生率是很难。

The birthrate in the city has been decreasing.

该市出生率一直持续下降。

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

图2叶出生率(A)和死亡率(B)平均值 Fig.

The birthrate is on the decline.

出生率在下降。

The birthrate is on the decrease.

人口出生率正在下降。

The birthrate is down this year.

年出生率下降。

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.

逐渐，烦脑欧洲政府正编织出生率政策以推动夫妻有更多小，从提供更好顾到针对户量每月津贴。