人一定要懂得“礼”之后才能产生恭敬之心,产生恭敬之心以后才能有所尊敬,有所礼让。
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。
The difference between good and great is the attention to detail.