里氏替换原则是面向对象编程中的一个基本概念,它指出子类的对象应该能够替换超类的对象而不影响程序的正确性。
预测未来的最好方式就是创造未来。
城市是一个不断进化的生命体。
The only real voyage of discovery consists not in seeking new landscapes, but in having new eyes.
I don't fear failure. I fear not trying.
事物背后必定隐藏着某些极为深奥的东西。
估计问题的性质与检验统计假设的问题不同。
"To read is to walk in someone else's shoes; to write is to leave your own footprints behind."