History has neither the desire nor the capacity to make men better or worse; it merely records what they have been and what they have done.
可归约性的概念对于理解不同计算问题之间的关系至关重要。
成功不仅仅在于你取得了什么成就，还在于你如何取得这些成就。
"A book is a world you can hold in your hands."