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.

生活是坚持与放手之间的平衡。

成功绝非偶然。它是努力、坚持、学习、研究、牺牲，最重要的是对你所做事情的热爱。

Collaboration is key in scientific discovery; no one can do it alone.

A person may cause evil to others not only by his actions but by his inaction， and in either case， he is justly accountable to them for the injury.