自动机和形式语言的研究对于理解计算的极限是基础性的。
麻雀因孔雀驮著翎尾而替它担忧。
真正的领导者倾听多于发言。
语言不仅是交流的工具,也是思想的载体。
But there is no such liberty as the power to dispose of what we please.
The only way to have a friend is to be one.