The concept of a black hole firewall challenges our understanding of quantum mechanics and general relativity.

The low price-earnings strategy has worked for me for 30 years.

这就是痛苦的特性，它要求被感受到。

A thing is not necessarily either true or false; it can be both true and false.

作一个不满足的人，胜过一只满足的猪；作一个不幸的苏格拉底，胜过作一个满足的痴人。