现代密码学的挑战不仅是确保通信安全，而且要以既高效又可扩展的方式实现。

I am always glad to think that my education was, for the most part, informal, and had its roots in the real world.

Every decision we make in forestry today will echo for generations to come.

最危险的故事是那些真实的故事。

The historian is a prophet looking backward.

我已经履行了我的职责。我证明了庞加莱猜想，我在数学上没有什么可做的了。

史记

最优秀的采石场不仅提取价值，更通过再生创造价值。