写作是让不可见的东西变得可见。
To write is to make the invisible visible.
I write songs to remember and also to forget.
Give a man a fire and he's warm for a day, but set fire to him and he's warm for the rest of his life.
优秀的设计解决问题，而卓越的设计预见问题。
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。