The anarchic nature of the international system means that states must rely on self-help to ensure their survival.

预测未来的最好方式就是创造未来。

"Quantum cryptography is not about keeping secrets, it's about knowing when someone is trying to steal them."

We cannot choose the times, but we can choose how to respond to them.

并不是我们所有的人都会拥有浪漫。