穷人面临的约束往往是政策制定者看不到的。
没有艺术；没有文学；没有社会；最糟糕的是，持续的恐惧和暴力死亡的危险；人的生命是孤独、贫穷、丑陋、野蛮和短暂的。
We must balance the need for affordable energy today with the imperative of building a sustainable energy future.
Leadership means making tough decisions today for a better tomorrow.
The best ideas often come from unexpected places.
The pursuit of mathematical knowledge is a never-ending adventure, filled with challenges, surprises, and the satisfaction of solving the unsolvable.
