The Liskov Substitution Principle is a fundamental concept in object-oriented programming, stating that objects of a superclass should be replaceable with objects of a subclass without affecting the correctness of the program.

【大意】干枯的竹子能生火，但不去钻它就不会燃烧；地下藏有泉源，但不去挖掘就流不出泉水来。

如果够真诚我应该告诉你，我现在依然阅读童话，而且它们是我最爱的读物。

有时候，我们无法改变的事情最终改变了我们。

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.