—— 请按键盘 空白键 开始游戏 ——

The only freedom which deserves the name is that of pursuing our own good in our own way, so long as we do not attempt to deprive others of theirs, or impede their efforts to obtain it.
"The world is full of obvious things which nobody by any chance ever observes."
现代密码学的挑战不仅在于保护信息,而且在于以一种既高效又可扩展的方式来实现。
The intelligence of drones will change our way of life.
Never stop learning because the world never stops changing.