So, again, there could be constants in here, but just to give you a sense of this.

但是这只是让大家去有个印象，如果我一秒钟运算十亿次。

麻省理工公开课 - 计算机科学及编程导论课程节选

Let's suppose n is 1000, and we're running at nanosecond speed.

假入我们一秒钟运算十亿次，我们已经看过了对数级，线性增长的。

麻省理工公开课 - 计算机科学及编程导论课程节选

So each time through the loop, I'm doing three steps. Three basic operations.

因此每次运行这个循环，我做了三次基本运算。

麻省理工公开课 - 计算机科学及编程导论课程节选

It did a million operations per second.

它能每秒运算1百万次。

麻省理工公开课 - 计算机科学及编程导论课程节选

Now, the nanosecond is what, 10 to the minus 9 seconds.

一纳秒就是10的9次方分之一秒，而这个电脑一秒可以做2G次运算。

麻省理工公开课 - 计算机科学及编程导论课程节选