I want to talk about efficiency, and we're going to, or at least I'm going to, at times also refer to this as orders of growth, for reasons that you'll see over the next few minutes.

为什么是很有价值的，我想要讨论下效率，我们将会，或者至少我将会不时的，提到有序的增长,原因你们很快就会明白的。

麻省理工公开课 - 计算机科学及编程导论课程节选

We've talked about why we use the pop music.

我们也讨论了我们为什么要用流行乐举例。

耶鲁公开课 - 聆听音乐课程节选