数学不是关于数字、方程、计算或算法的：它是关于理解的。
Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.
The past is never dead. It's not even past.
The most important quality in a scientist is persistence.
跨行业和跨国界的合作对于满足世界能源需求至关重要。