奥吉改变不了他的容貌，但我们能改变我们看他的眼光

每个工人的工作都由管理层至少提前一天完全计划好，并且在大多数情况下，每个人都会收到完整的书面指示，详细描述他要完成的任务。

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.

In mathematics, the most profound ideas often arise from the simplest observations.