The truth of the matter is if you look at the technology industry, there's always a few big guys, some medium size guys, lots of small guys, and the names are always changing because the industry is so darn dynamic, and there's so much new stuff being invented.

真相是，如果你回首科技行业，人总会分为三六九等，耳熟能详的名字总在变化,因为这个行业发展实在太快了，有如此多的新事物被发明出来。

斯坦福公开课 - 微软CEO-Steve.Ballmer谈科技的未来课程节选

And that's just a way of reminding you that we want to think carefully, but what are the things we're trying to measure when we talk about complexity here? It's both the size of the thing and how often are we going to use it? And there are some trade offs, but I still haven't said how I'm going to get an n log n sorting algorithm, and that's what I want to do today.

这只是在提醒你们我们要仔细的思考问题,但是当我们在讨论复杂性的时候,我们到底要衡量哪些东西？,是列表的大小和对其进行查找的频率吗？,这里面临一些取舍,但是我还没有说明,怎样得到一个n，log，n复杂度的排序算法,并且这是我今天想要讲的内容。

麻省理工公开课 - 计算机科学及编程导论课程节选