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.

一个人可以选择退回安全地带或迈向成长。成长必须一次又一次地选择；恐惧必须一次又一次地克服。

创新是在竞争激烈的市场中保持领先的关键。

I constantly see people rise in life who are not the smartest, sometimes not even the most diligent, but they are learning machines. They go to bed every night a little wiser than they were when they got up.

道德不崇高广大就不能招揽人才, 气量不宏大就不能使人安定

数学语言是普遍的，超越了文化和语言的障碍。

解析：良知即天理。