Today, America faces a make-or-break moment for the middle class. After the worst economic crisis of our lifetimes, some still want to return to the same policies that got us into this mess. They&rsqu
THE PRESIDENT: Thank you for the warm welcome. And Laura and I are thrilled to be here at Kearny School. We have come because this is one of the really fine schools in the city of Philadelphia. We bri
It's crucial to realize that the rate of progress doesn't matter, because any progress is enough to get us into the end zone. 我们要知道这个进程的速度并不重要，因为任何进程都足够让我们走进死胡同。 We don't need Moore's law to continue.
