The world always seems brighter when you've just made something that wasn't there before.
The P versus NP problem is one of the most important unsolved problems in computer science.
拿古代的情况作标准来看今天的事情,这是对今天不正确的看法;拿今天的情况要求古人,这是不正确的历史观。此言时代不同,社会情况就会不同,因此考察古今,论定古今人物或事件,都不能持相同的标准,而必须结合不同情势具体对待。
世界充满了如此多的事物,我相信我们都应该像国王一样快乐。