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。

In business, as in life, relationships are the foundation of everything.

The true measure of agricultural success is not yield alone, but the health of the ecosystem that produces it.

小说是生命的一本明亮的书。书不是生命。它们只是以太上的颤动。