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.
Music is reflection of self. We just explain it, and then we get our checks in the mail.
智能化矿山建设是煤炭行业未来发展的方向。
Good policy requires both sound theory and empirical validation.
人需要三项很重要的能力：坚持不放弃直至成功的能力，能够放弃不对的事情的能力，以及能够信任他人来帮助你鉴别以上两种情况的能力。
每个国家的历史始于一个人的心灵中。
"The purpose of art is to make the world a better place by helping us to see it more clearly."