Core technologies cannot be bought; they must be developed independently.
核心技术是买不来的，必须靠自己研发。
民族的灵魂活在它的语言中。
数学家是能在定理间找到类比的人；更好的数学家能在理论间看到类比；而最优秀的数学家能注意到类比之间的类比。
你的时间有限，所以不要浪费在过别人的生活上。
"We are all prisoners of our own memories, and the past is a jail from which we can never escape."
当一件事有趣时，探寻其中隐藏的真相。
The Internet is for everyone.
I never think about the past. I always look forward to the next challenge.