At college, Barack Obama didn't know that he would be the first black president of the United States of America.

大学时，巴拉克·奥巴马并不知道他会成为美国第一位黑人总统。

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With my family we're excited to have this opportunity to serve the President and the people of the United States of America.

我和我的家人都很兴奋有这个机会为总统及美国人民服务。

youdao

At college, Barack Obama didn't know that he will be the first black president of the United States of America.

大学时期的巴拉克·奥巴马不知道自己将是美利坚合众国第一位黑人总统。

youdao

A year later, the president of the United States, Jimmy Carter, honored the social scientist with America's highest award for civilians.

VOA: special.2010.01.17

A year later, the president of the United States, Jimmy Carter,honored the social scientist with America's highest award for civilians.

VOA: special.2011.07.03

The convention named former United States Senator Jefferson Davis to be president of the Confederate States of America.

VOA: special.2009.07.23

In numerous instances, the manager of the New York Yankees shares a handful of unique commonalities with the President of the United States of America.

FORBES: Connect

C. this time is especially special because before you are the President of the United States of America, you are a great, close friend of mine.

WHITEHOUSE: President Obama Toasts President Lee Myung-Bak of the Republic of Korea | The White House

Senator BARACK OBAMA (Democrat, Illinois): Tonight, I can stand here and say that I will be the Democratic nominee for the president of the United States of America.

NPR: Obama Clinches, Offers to Talk to Clinton