The world demographic transition takes--

世界的人口状况转变
it is as nearly regular as clockwork

规律得如同钟表走时一般
and it takes societies from poverty, short life spans,

将社会从贫困短寿命
high birthrates, high death rates

高生育率高死亡率
to relative affluence combined with capital,

转变为资本的相对富裕
relative affluence with long lives, low birthrates, low death rates

寿命相对延长生育率和死亡率也降低
and lurking behind the diagram before you is

而隐藏在你们面前表格数据背后的
the confluence of the great economic surge

则是经济的腾飞
and the world demographic transition.

以及世界人口状况的转变
So forty-five minutes from now we should be at that point.

这些就是我们这四十五分钟要讲授的内容
The diagram on the board

投影上的这个图表
is the work of Swedish economist Hans Rosling,

是由瑞典经济学家汉斯·罗斯林完成的