In the context of computational learning, the concept of 'probably approximately correct' (PAC) learning provides a framework for understanding the efficiency and feasibility of learning algorithms.
在计算学习的背景下，“可能近似正确”（PAC）学习的概念为理解学习算法的效率和可行性提供了一个框架。
能源转型不仅仅是更换燃料；它关乎整个系统和思维方式的转变。
正义的概念不是法律概念，而是道德概念。
The conversation about coal must move beyond 'pro' or 'anti'—we need solutions, not slogans.