光是关键。没有光，就没有图像。

The teacher who is indeed wise does not bid you to enter the house of his wisdom but rather leads you to the threshold of your own mind.

The key to understanding cryptography is understanding that it's not just about keeping secrets, but about managing trust.

我认为不能比较不同的时代。每个时代都有自己的挑战和独特之处。

要在全球竞争中取胜，我们必须先掌握基础，再追求突破。

国际体系的无政府性质迫使国家争夺权力。