问题的数学表述通常比其解决方案更重要,后者可能仅仅是数学或实验技巧的问题。
It is a curious subject of observation and inquiry, whether hatred and love be not the same thing at bottom.
人们总是认为他们会写一本书。他们认为他们会写一本书,然后他们没有。
Wherever there is modularity there is the potential for misunderstanding: Hiding information implies a need to check communication.