Success is not final, failure is not fatal: it is the courage to continue that counts.
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。
创新是一个社会过程,而不仅仅是技术过程。
The true value of a forest isn't measured in board feet, but in biodiversity and carbon sequestration.