On the back, they have a little chichi that tells them what to do.

后面我们会有人,专门告诉大家如何去做。

哈佛公开课 - 计算机科学课程节选

So now, a little chichi up top, they are representing the letter?

他们代表哪个字母呢？

哈佛公开课 - 计算机科学课程节选

So this is kind of a nice chichi.

这就是个很好的例子。

哈佛公开课 - 计算机科学课程节选