The truth is rarely pure and never simple.

文学让我们能够活出千种人生，体验千种情感。

死亡是少数几件只要躺下就能完成的事情之一。

The most successful modern states are those that have been able to harness the power of the market while maintaining a strong state capable of enforcing rules and providing public goods.

系统辨识是从观测到的输入输出数据中建立动态系统数学模型的科学与艺术。