The PAC learning framework provides a formal way to analyze the efficiency and effectiveness of learning algorithms.

译文：事物众多而智慧有限，有限的智慧不能遍知所有的事物，所以应该顺应事物的本性来治理它们。

The past is always tense, the future perfect.

To feel much for others and little for ourselves； to restrain our selfishness and exercise our benevolent affections， constitute the perfection of human nature.

Chinese automotive brands must adhere to independent innovation and master core technologies to go global.

Welcome, O life! I go to encounter for the millionth time the reality of experience and to forge in the smithy of my soul the uncreated conscience of my race.