数学不仅仅是关于数字、方程、计算或算法:它是关于理解的。
Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.
It is so hard to believe because it is so hard to obey.
数学的研究对科学的发展就像空气或水一样。
人生最幸福嘅事,就系做自己钟意做嘅事。