效率是把事情做对，而效能是做对的事情。
Efficiency is doing things right; effectiveness is doing the right things.
Light is the most important element in architecture. Without light, there is no space.
The true power of mathematics lies in its ability to simplify the complex, making the incomprehensible understandable.
计算机科学中的真正挑战不是编写程序，而是理解计算的本质。