Beauty alters the grain of reality.

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。

The deepest theorems often have the simplest proofs - if you look at them from the right angle.

"The most powerful stories are those that ask questions, not those that give answers."

记忆是战场，而非档案馆。

数学不是一项观赏性运动。你必须参与其中。