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.

指科研需要耐得住寂寞，长期坚持

人的手十分精细和复杂，它不仅使心灵得以展现，还能使人跟整个环境建立一段特殊的关系。

艺术家的职责是成为时代的见证者。

I believe in the power of dreams and hard work.