1. Teachers are both creators of the Utopia and the helpers of undoing cryptograms. 教师既是乌托邦的创造者,也应该成为解开现时密码的有力助手;
2. The estimation of the time to break the cryptograms shows that it will take too much time with the aid of available computer technology. 对破密时间的估算表明,利用现有计算机技术所需的破密时间极长。