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.

A wise man said: before you speak， let your words pass through three gates. At the first gate， ask yourself， "Is it true？" At the second gate， ask "Is it necessary？" At the third gate， ask， "Is it kind？"

一本书是世界的一个版本。如果你不喜欢它，忽略它；或者提供你自己的版本作为回应。

电影的未来掌握在那些敢于梦想和讲述新故事的人手中。