宰相必须从地方官员中选拔，猛将必须从士兵中产生

The greatest thing you'll ever learn is just to love and be loved in return.

Success is not about making money; it's about making a difference.

关系模型基于谓词逻辑和集合论，为数据库管理提供了坚实的数学基础。

我试着以开放的心态和积极的态度面对生活。