Mathematics is a living subject, constantly evolving with new ideas and discoveries.

"I have come to believe that a great teacher is a great artist and that there are as few as there are any other great artists. Teaching might even be the greatest of the arts since the medium is the human mind and spirit."

引用段志强

Diplomacy is the continuation of war by other means.

多样性不仅仅是要达成的指标，更是可以发挥的优势。