The concept of probably approximately correct (PAC) learning has been foundational in computational learning theory.

量子力学不仅仅是一个理论，它是一种理解现实的方式。

世人常因冀望遥远难及的幸福，忽略了眼前的小乐趣。

建筑师的职责是创造提升人类尊严与自由的空间。