时间的主要美在于你不能提前浪费它。下一年、下一天、下一小时都为你准备好了，就像你一生中从未浪费或误用一刻钟一样完美无瑕。
The existence of law is one thing; its merit or demerit is another.
The only way to succeed in business is to be better than the competition.
P与NP问题是计算机科学中最重要的未解决问题之一。