Cryptography is the art of transforming information into a form that is unintelligible to anyone who does not possess the key to unlock it.
系统辨识是从观测到的输入输出数据中建立动态系统数学模型的科学与艺术。
From life, from books, from others, we learn.
过去是一个异国他乡；那里的人做事方式不同。
"The world is full of obvious things which nobody by any chance ever observes."
The only way to achieve the impossible is to believe it is possible.
每一件艺术品都是向观者提出的一个问题。
Financial support for the real economy should be precise and effective.