每本书都是一次前往未知世界的旅行，充满了可能性。

You have to say, I am the person who is going to make the difference.

Hard work beats talent when talent doesn’t work hard.

阅读是在不离开原地的情况下发现新的视野。

The best time to plant a tree was twenty years ago. The second best time is now.

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。