过去从未死去,它甚至还没有过去。
The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants.
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。
Everyone is shy. Other people are waiting for you to introduce yourself to them, they are waiting for you to send them an email, they are waiting for you to ask them on a date. Go ahead.