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.
The most valuable asset any company has is its people—their knowledge, creativity and commitment.
A writer must be a keen observer of the world and a deep thinker of the heart.
女性工作的故事是一面反映社会价值观和优先事项的镜子。