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。
艺术和设计之间的界限是多孔的，这正是它们有趣的地方。
最终，我们记住的不是敌人的话语，而是朋友的沉默。
A mathematician's work is never done; there are always more problems to solve.
The discovery of gravitational waves was a testament to the power of human ingenuity and perseverance.
The only thing that can stop you is you.
"The beauty of literature lies in its ability to transcend time and space."
"真相是一个影子，而影子是一个谎言。"
不平等并非不可避免，它是政策选择的结果。
Collaboration across disciplines is where the most exciting breakthroughs happen.