The Liskov Substitution Principle is a fundamental concept in object-oriented programming, ensuring that derived classes can be used in place of their base classes without altering the correctness of the program.

成功不是终点，失败也不是致命的：重要的是继续前进的勇气。

我相信讲故事的力量。这是我们理解世界的方式。

A woman knows the face of the man she loves as a sailor knows the open sea.

Take away love and our earth is a tomb.

We must focus on customers and continuously improve the quality of products and services.

Remember, hope is a good stuff, maybe the best thing, and no good stuff will fade away!

The music is not in the notes, but in the silence between.