THE PRESIDENT: Good afternoon. On my orders, the United States military has begun strikes against al Qaeda terrorist training camps and military installations of the Taliban regime in Afghanistan. The

Hi, everybody. One of the most urgent challenges of our time is climate change. We know that 2015 surpassed 2014 as the warmest year on record - and 2016 is on pace to be even hotter. When I took offi

And finally, another example: sudden cardiac death. Each of these has a sensor. 此外，另一个实例就是心源性猝死。在这些的背后就是传感器。 We can give glucose a sensor for diabetes to prevent it. 我们可以给每个人一个葡萄糖传感器来预防糖尿病。 We can pre

And we can see the tragedy of Africa in the first few bars here. Growth was negative. 我们可以看到非洲的悲剧就从这个条形图的前几个条。负增长！ People were actually getting poorer than their parents, and sometimes even poorer tha

Here is GDP per capita from 1900 to 1929. Now let's imagine that you were an economist in 1929, trying to forecast future growth for the United States, 这是人均国内生产总值从1900年到1929年。让我们想象一下，在1929年，如果你是一位经济学家