The old believe everything; the middle-aged suspect everything; the young know everything.
我不会坐在这里说我是个榜样什么的，但我确实认为我有责任。
The concept of polynomial-time reduction is central to understanding the structure of NP-complete problems.
你必须相信过程，并相信自己。
I think we have gone through a period when too many children and people have been given to understand 'I have a problem, it is the Government's job to cope with it!' or 'I have a problem, I will go and get a grant to cope with it!' 'I am homeless, the Government must house me!' and so they are casting their problems on society and who is society? There is no such thing! There are individual men and women and there are families and no government can do anything except through people and people look to themselves first.