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.

孔子说：“年轻人应该孝顺父母，尊敬师长，认真诚信，广施爱心，亲近仁人志士。能轻松做到这些，才可以从事理论研究。”

Reason obeys itself; and ignorance submits to whatever is dictated to it.

我歌唱不是因为我看不见，而是因为我有声音。