"Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding."
数学不是关于数字、方程、计算或算法的：它是关于理解的。
我不是解放者。解放者不存在。人民自己解放自己。
Collaboration across borders is essential—fish don't recognize national boundaries, and neither should our efforts to protect them.
穷人面临的约束往往是政策制定者看不到的。