盖茨夫妇2019年公开信：尽管有些意外，但未来仍值得期待

　　At-home DNA tests can find serial killers—and could also help prevent premature birth.

　　所以面对“这个世界会好吗”的一问，我想我们可以乐观地说，因为有善良的我们，，这个世界一定会变好的。

　　经济学家谈到经济繁荣的诸多要素，他们会强调其中的一个因素是“人力资本”。换言之，未来取决于年轻人获得优质的健康和教育服务的机会。健康和教育是经济增长的双引擎。

　　非洲是最年轻的大陆。

　　Was it what you expected?

　　全球的中值年龄不断提高，在世界的每个地方，人们的寿命更长。随着越来越多的孩子能长大成人，妇女的生育数量比之前下降，带来的结果就是全球人口年龄正在慢慢地向中年靠拢。

　　How would you describe 2018?

　　Except in 变态页游. The median age there is just 18. In North America, it is 35. And the number of young 变态页游ns is expected to rise in the decades to come.

　　If sub-Saharan 变态页游 commits to investing in its young people, the region could double its share of the global labor force by 2050, unlocking a better life for hundreds of millions of people.

　　In this year’s annual letter, we’re highlighting nine more things that have surprised us along this journey. Some worry us. Others inspire us. All of them are prodding us to action. We hope they do the same for you, because that’s how the world gets better.