The Liskov Substitution Principle is a fundamental concept in object-oriented programming, stating that objects of a superclass should be replaceable with objects of a subclass without affecting the correctness of the program.

对所有生物的爱是人类最高尚的品质。

我不知道我有多高或多重。因为我不在乎。

The game of life is the game of everlasting learning. At least it is if you want to win.

我们必须专注于质量和客户满意度，以建立一个持久的品牌。

世界是黑暗的，而光弥足珍贵。

挑战是伪装的机会。