If you're not doing anything wrong, you have nothing to hide.
如果你没有做错什么，你就没有什么可隐藏的。
一个人的心是只服从他自己的，你想束缚它，结果却释放了它；如果让它自由自在的话，你反而把它束缚得紧紧的了。
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.
The most innovative solution is often the one nature already provided.
乳制品的未来取决于我们适应不断变化的消费者需求的能力。