fertility ratio

• 人口出生率

fertility ratio的用法和样例：

例句

1. They are the only possible means of dealing with excessive fertility.
   它们是解决人口出生率过高这一问题的唯一手段。
2. But whatever the cause, it seems to mean fertility rates can overshoot downwards.
   然而不管原因是什么，看起来都表示人口出生率下降过头了。