Unless you tell them what to do they're not gonna know how to do it.

除非你告诉它要做什么,它自己是不知道做什么的。

哈佛公开课 - 计算机科学课程节选

same point It says, if you give me two of these data objects, I'm going to call them p 1 and p 2.

的代码，What，does，it，say，to，do？,你可以看看它,它是用来做什么的呢？,它的意思是，如果你给我两个。

麻省理工公开课 - 计算机科学及编程导论课程节选

Thank you. Yeah, I was going to say, think about what does str do, in general?

谢谢你，对了，我正想要说呢，想想通常str是用来做什么的？

麻省理工公开课 - 计算机科学及编程导论课程节选