Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.

Every piece of plastic we produce should have a clear path to reuse or recycling.

经济进步的叙述必须包括那些被落下的人的声音。

对付一个不自由的世界的方法就是变得如此绝对自由，以至于你的存在本身就是一种反叛。