When we fail to set boundaries and hold people accountable, we feel used and mistreated.

读报或者看电视新闻时，总是难免碰上一个又一个的为社会问题的解决提供了新的解决方案的人。

Profit and sustainability must walk hand in hand; one cannot long exist without the other.

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.