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 always with us, and it shapes who we are and what we become.
The chemical industry is the backbone of modern civilization, and we must treat it with the responsibility it deserves.
最好的建筑既是谦逊的，又是英雄的。
When given the choice between being right or being kind，choose kind.
The human race has one really effective weapon, and that is laughter.
The most realistic distinction between the investor and the speculator is found in their attitude toward stock-market movements.