求翻译：2008年11月5日，奥巴马击败共和党候选人约翰·麦凯恩，正式当选为美国第四十四任总统.于2009年1月20日，在美国首都华盛顿特区参加就职典礼，发表就职演说，并参加了游行。任期4年。根据美国法律，他还可以在2012年，再次竞选总统是什么意思？

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On November 5, 2008, the Austria Pama defeats Republican Party candidate John · Mccain, was elected officially as American 44th presidents. In January 20, 2009, in US capital the Washington D.C. participation inauguration, the publication inaugural address, and attended the parade.Tenure in office 4

On November 5, 2008, Barack Obama defeated Republican candidate John McCain, duly elected to the United States 44th President. January 20, 2009, in the United States capital of Washington, DC, to participate in the inauguration, in his inaugural address, and participated in the parade. 4-year term.

November 5, 2008, Obama beat Republican candidate John McCain formally elected as the forty-fourth President of the United States. On January 20, 2009, in the U.S. capital Washington DC to attend the inauguration ceremony, inaugural speech, and participated in the parade. Four-year term. Under U.S.