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At the moment, humanity faces a major challenge and millions of lives are in danger.
当下，人类面临着重大挑战，数百万的生命处于危险之中。
As a cosmologist I see the world as a whole
作为宇宙学家，我把世界看做一个整体
and I'm here to address one of the most serious public health problems of the 21st century.
我要指出21世纪一个重大的健康问题
Today, too many people die from complications related to overweight and obesity.
今天，有太多人死于与超重和肥胖有关的并发症，
We eat too much and move too little.
我们吃得太多，活动却太少
Fortunately, the solution is simple.
幸运的是，解决方法很简单
More physical activity and change in diet. It's not rocket science.
更多的体力活动以及改变饮食结构。这不是火箭科学
And for what it's worth,
我想做出的评价是
how being sedentary has become a major health problem, is beyond my understanding.
久坐竟然成了一个健康问题，这已经超出了我的理解。
