All of the great empires of the future will be empires of the mind.
从今往后,所有的帝国都是思想的帝国。
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。
Sustainability isn't an option; it's a necessity for the future of energy.