系统辨识的挑战不仅在于拟合数据，还在于提取有意义且可推广的模型。

"We all have a responsibility to bear witness to what we see and to speak out against injustice."

文学是在非人的世界中保持我们人性的火焰。

The sea was flat and calm, like a mirror reflecting the sky.

The world is everything that is the case.

我深信投机是失败者的游戏。

人若能常保持清静之心，天地万物都会与之和谐共存。