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President Obama's Farewell Address to the Nation (January 7, 2017)奥巴马总统将发表告别演讲(2017年1月7日)Since the days of George Washington, presidents have delivered some form of final message while in office – a...

Gettysburg AddressFour scoreand seven years ago, our fathers brought forth on this continent, a new nation,conceived([kən'sivd]构思；设想) in liberty, and dedicated to the proposition that all men are crea...