要理解宇宙，我们必须首先理解自己。

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.

永远不要低估合作的力量——伟大的事情很少是独自完成的。

I'm a person who likes to be rare.