可能近似正确（PAC）学习的概念在计算学习理论中具有基础性意义。
The concept of probably approximately correct (PAC) learning has been foundational in computational learning theory.
And those who were seen dancing were thought to be insane by those who could not hear the music.
Always plan for the worst and hope for the best.
Force and fraud are in war the two cardinal virtues.
"Language is both a bridge and a barrier, it connects us but also keeps us apart."
The streets of Paris have a memory of their own.
车间里应该同等弥漫着木屑和梦想的气息。