Hi, everybody. Today, there are 2. 2 million people behind bars in America and millions more on parole or probation. Every year, we spend $80 billion in taxpayer dollars to keep people incarcerated. M

And so you may say, well, given all of that, why then doesn't it work? 你可能说，就算这样，为什么不奏效呢？ Why can we not make our politicians change? Why can't we demand them? 为什么我们无法让政党改变？为什么我们无法要求他们？ Well I, like a

Hi. This week, I got the chance to sit down with some impressive students at Lorain County Community College in Ohio. One of them was a woman named Andrea Ashley. Two years ago, Andrea lost her job as

and also give our customers a much better and easier approach to handle some of the things that they're seeing. 并且为我们的用户打造更好而简便的方法来处理一些问题。 So a lot of what we're doing is around technology, bu

So while she's sleeping -- and the rover does sleep at night 当然，在她睡觉的时候，她晚上确实是在睡觉， because she needs to recharge her batteries and she needs to weather the cold Martian night. 因为她需要给电池充电，而且她需要抵抗住火星晚上的