制革厂的废水是其价值观最真实的衡量标准。
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.
解释:了解古代不了解现在,称为愚昧无知,那么儒生就只能称作愚昧无知的人了。
The only limit to our realization of tomorrow will be our doubts of today.