Birth rates go down for many reasons.

下降的原因有很多。

Which of these nations has the lowest birth rate?

以下哪个国家低？

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

战后一度激增。

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

所有这些族将继续维持在平均以上。

Experts say there are many reasons for falling birth rates.

专家说，下降的原因有很多。

And that other problem is an incredibly low birth rate.

另一个问题是极低。

And birth rates for women in their teens and 20s reached record lows.

十几岁和二十几岁女性的育低记录。

Because of the policy, China's birth rate has dropped dramatically.

由于该政策，中国的大幅下降。

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

到目前为止，提高日本的一直是一场失败的战斗。

Birth rates continued to fall for teenagers and women in their 20s.

青少年和20多岁女性的育继续下降。

But from 2014 to 2018, the twin birth rates fell 4 percent.

但在2014年至2018年，双胞胎下降了4%。

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

这也将帮助提高国家不断下降的。

Immigration helped to make up for a low birth rate in Germany.

移民帮助弥补了德国较低的。

But as birth rates have fallen, pets have become more intimate companions.

但随着的下降，宠物已成为人类更亲密的伴侣。

Just looking at recent years, the change in age specific birth rates has been drastic.

仅从近年来的情况来看，各年龄段人口的变化是巨大的。

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下降的挑战。

However, other experts say it is more likely that birth rates will fall.

然而，其他专家说更有可能下降。

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

一份政府报告发现，2020年美国下降了4%。

The nation's birth rate has also been going down for years.

多年来，该国的也一直在下降。

South Korea, however, is not the only nation concerned about falling birth rates.

然而，韩国并不是唯一一个担心下降的国家。