Before 1800 no country in the world had an average life expectancy at birth beyond 40.

1800年之前，世界上没有哪个国家的人口在出生时的平均预期寿命超过40岁。

Alright, a little good news. On the whole, throughout the world, life expectancy at birth has been increasing.

好了，说一点儿好消息。总的来说，全世界的出生时预期寿命都在增加。

People born in Africa have a life expectancy at birth that's 12 years less than the global average.

非洲人的出生时预期寿命比全球平均寿命少12年。

For most of human history, life expectancy at birth was around 30.

在人类历史的大部分时间里， 出生时的预期寿命约为 30 岁。

Currently, the World Health Organization says the global life expectancy at birth is jut over 71 years.

目前，世界卫生组织表示，全球出生时的预期寿命超过 71 岁。

For men in the United States, the average life expectancy at birth is 76.3 and for women, it’s 81.2.

美国男性的平均预期寿命为 76.3 岁，女性为 81.2 岁。

The nearly one-year decline from 2020, to 76.1 years, marked the largest two-year drop in life expectancy at birth in close to a century, the US Centers for Disease Control and Prevention (CDC) found.

美国疾病控制和预防中心发现，自 2020 年起，美国的平均预期寿命出现了近 1 岁的下降，缩短至 76.1 岁，这也是近一个世纪以来美国平均预期寿命最大的两年降幅。

These have helped to dramatically raise humanity's life expectancy at birth across the world, like in the United States where between 1900 and 2010 life expectancy increased from just 47.3 years up to 78.7 years.

这些都有助于大幅提高全世界人类的出生时预期寿命，比如在美国，1900年到2010年之间，预期寿命从只有47.3岁提高到78.7岁。