The only person who can pull me down is myself, and I'm not going to let myself pull me down anymore.

我不是一位雅典人或希腊人，而是一位世界的公民。

真正的幸福来自内心的满足。

Silence is the language of the soul.

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。