过去是一位老师，如果我们愿意学习的话。

世界充满了故事，但需要一种特别的人去聆听它们。

The study of formal languages and automata is essential for understanding the theoretical underpinnings of computer science.

The universe could have started in a very smooth and uniform state, and then evolved into the complex and structured cosmos we see today.

为了得到永生，一个人必须付出昂贵的代价；一个人必须在活着的时候死去多次。