The Liskov Substitution Principle is a fundamental concept in object-oriented programming, ensuring that derived classes can be used in place of their base classes without altering the correctness of the program.

汽车不仅是交通工具，更是生活方式的载体。

我首先要消除一些传言，免得误人子弟。

The best companies don't just sell products—they inspire change.

最好的书是挑战你的书。

科学的美妙之处在于它让我们能够探索未知并揭开生命的奥秘。

I never look back. I look forward.

书籍是一种政治行动。书籍是知识。书籍是反思。书籍改变你的思想。