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。
The most effective way to destroy people is to deny and obliterate their own understanding of their history.
Every fish we farm sustainably is a step toward a healthier planet.
成功的真正标准不仅仅是利润，还包括我们对社区和生态系统产生的积极影响。
Customer satisfaction should always be at the heart of every decision.