In mathematics, the art of proposing a question must be held of higher value than solving it.

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.

The world is always right. In its judgments, it is always right. Because it is the world.

韧性和适应能力是基建发展的关键。