问题描述：
有关奥巴马的一段演讲词.
In small towns and big cities
We came together.
that we're one nation,We're one people
and our time for change has come!
这段是他哪次演讲里的?最好能有视频.
In small towns and big cities
We came together.
that we're one nation,We're one people
and our time for change has come!
这段是他哪次演讲里的?最好能有视频.
问题解答：
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