After the war there was a bulge in the birth rate.

战后出率一度激增。

Which of these nations has the lowest birth rate?

以哪个国家出率最低？

In the US, births have been steadily dropping for the past decade.

过去十年，美国的出率一直在稳步降。

So far, boosting Japan's birth rate has been a losing battle.

到目前为止，提高日本的出率一直是一场失败的战斗。

Prince Edward Island, it has an aging population and a declining birth rate.

爱德华王子岛，面临着人口老龄化和出率降的挑战。

All of these groups continue to have above-average birth rates.

所有这些族群出率将继续维持在平均以上。

Experts say there are many reasons for falling birth rates.

专家说，出率降的原因有很多。

Health experts say there is no single explanation for the falling twin birth rates.

康专家表示，双胞胎出率降没有单一的解释。

While the latest drop was not huge, officials said they consider it a good sign.

虽然双胞胎出率最近的跌幅并不算太大，但官员表示，他们认为这是一个好迹象。

First, many births and many deaths due to bad living conditions.

第一阶段，由恶劣的活条件引发的高出率和高死亡率。

Recent Hispanic population growth has mostly been driven by births, not fresh immigration.

近期的拉美裔人口激增也更多的是因为出率的上升而非新移民的涌入。

But over the years birth rates fell. Families began to have fewer and fewer children.

但是这些年出率降了，人们要的孩子数开始越来越少。

And that other problem is an incredibly low birth rate.

另一个问题是出率极低。

Last year, Finland had the lowest number of babies born in the country since 1868.

去年，芬兰的出率是自1868年以来最低的。

The number of babies born in Finland has dropped for the past nine years.

过去九年，芬兰的出率降。

It will also help to increase the country's declining birth rate.

这也将帮助提高国家不断降的出率。

A county's population can grow even when there are more deaths than births.

即使一个县的死亡率超过出率，人口也可能会增长。

A government report found the U.S. birth rate fell four percent in 2020.

一份政府报告发现，2020年美国出率降了4%。

The government reported a one percent increase in U.S. births last year.

该政府报告称，去年美国的出率增加了1%。

Then you would have births minus deaths.

你也可以用该城市的出率减去死亡率。