数学中最深刻的问题往往源于最简单的问题。
学习数学的唯一方法就是做数学。
Success is not final, failure is not fatal: it is the courage to continue that counts.
美しいものは、いつかは壊れる運命にある。
The future of petrochemicals lies in sustainability and efficiency.
Purity of heart is to will one thing.