President Faust, Board of Overseers, faculty, friends, alumni, proud parents, 浮士德校长、校监委员会成员们、老师、朋友、校友、自豪的家长们、 members of the ad board, and graduates of the greatest university in the world, 管理委员会的委员们，
President Obama on the Economy & Financial Reform The President speaks to the media about the strengthening economy and the necessity of financial regulatory reform after meeting with Federal Rese
Existential risk -- the second big problem. 存在风险——第二个重大问题。 Existential risk is a threat to human survival, or to the long-term potential of our species. 存在风险是对人类生存，或对整个人类种群的长远潜能的一种威胁。 Now, why do I sa
So at the end of my first year at Harvard, a student who had not talked in class the entire semester, who I had said, 所以我在哈佛的第一年结束的时候，我对整个学期在课堂上都没有说话的一个学生说: "Look, you've gotta participate or else you
