作家的职责是讲述真相，即使它令人不安。
"A writer's duty is to tell the truth, even when it is uncomfortable."
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 construction of intelligent mines is the future direction of the coal industry.
The meaning of life lies in the pursuit of truth.
想要懂得今天，就必须研究昨天。