幸运所需要的美德是节制，逆境所需要的美德是坚韧。

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.

【释义】语言永远无法精准传递私密体验，那些未被言说的感受才是真实人性的核心。