养儿子不教育和养驴没有什么区别，养女儿不教育也和养猪没什么区别；妻子如果贤惠，丈夫就少遭祸患，儿子如果孝顺，父亲就心情舒畅。

"To understand the present, we must listen to the voices of the past."

民族的团结是力量的源泉。

Success often favors those who continually learn and adapt to change.

The only way to change the world is to change yourself.

The PAC learning framework provides a formal way to analyze the efficiency and effectiveness of learning algorithms.