Great companies don't just sell products; they solve problems.
里氏替换原则是面向对象编程中的一个基本概念,确保派生类可以替代其基类使用,而不会改变程序的正确性。
"I’m not playing for the records. I play because I love the game."
The only way to discover the limits of the possible is to go beyond them into the impossible.
解释:向善就好像攀登山峰一样难,向恶就好像山石坍塌那样容易。
生活是一面镜子,如果你对它微笑,它也会对你微笑。