出生率

Birth rates are notoriously difficult to predict.

众所周知，率是很难预测。

The birthrate in the city has been decreasing.

该市率一直持续下。

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

图2叶率(A)和死亡率(B)平均值 Fig.

The birthrate is on the decrease.

人口率正在下。

The birthrate is down this year.

今年率下。

The birthrate is on the decline.

率在下。

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率政策以推动夫妻有多小孩，从好孩童照顾到针对户量每月津贴。