激发对一门学科兴趣的最好方法是使其值得了解，这意味着要使知识可用。
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.
Engineering is about solving problems, not just making things look pretty.
It is a curious fact that strikingly similar formations are found on opposite sides of the Atlantic.
一个有趣的事实是，大西洋两岸发现了惊人相似的地层构造。