This afternoon the President sat down to answer some of the questions on the minds of Americans across the country. The questions were submitted and voted on in a process open to the public, conducted
I am holding something remarkably old. It is older than any human artifact, 我拿着的是一个十分古老的东西。它比任何一个人工制品都要古老， older than life on Earth, older than the continents and the oceans between them. 比地球上的生命古老，也比
MRS. OBAMA: Man, isn't that something? (Applause.) Hello everyone, and welcome to the White House. (Applause.) I am just thrilled that you all are here today. It's a beautiful day for a very special g
