FRUGALITY. Make no expense but to do good to others or yourself; i.e., waste nothing.
节俭：只为对人对己有益的事情买单，即不要浪费。
The most effective way to help the planet is to stop eating animals.
The mind is everything. What you think you become.
Success is doing what you want to do, when you want, where you want, with whom you want, as much as you want.
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.