知识的每一次进步都会带来新的问题和新的困难。

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

生命的价值不在于寿命的长短，而在于我们如何利用它。

友情は、時には言葉を超えた理解を生む。

That man, I think, has had a liberal education who has been so trained in youth that his body is the ready servant of his will.  

永远不要在安全上妥协——它是我们所做一切的基石。