密码学的目标是使破解系统的成本超过受保护信息的价值。
We don't inherit forests from our ancestors, we borrow them from our children.
活着是世界上最罕见的事情。大多数人只是存在，仅此而已。
The poet's task is to illuminate the darkness.
作家必须有勇气说出别人不敢说的话。