"The essence of mathematics lies in its freedom."
数学的本质在于它的自由。
Success is not final, failure is not fatal: It is the courage to continue that counts.
Sustainability isn't an option; it's our responsibility to future generations.
一个从未犯错的人是因为他不曾尝试新鲜事物。
The most important thing is to keep thinking, keep questioning.