可持续发展需要平衡经济效益与环境保护。

The novel is the only art form capable of fully representing human complexity.

The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man. )

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。