It looks a little cryptic but it actually just does what it says.

这看起来有点神秘，但是它就是这样做的。

哈佛公开课 - 计算机科学课程节选

This might look a little cryptic at first, but it turns there is some very obvious patterns here, for instance. According to this chart, if you want to represent the letter A A in the so called ASCII system, what number do you actually use to do so?

起初，它看起来有点神秘，但你会发现它有一些明显的对应模式，这里就有例子，根据图表，在所谓的ASCII系统中,你想表示字母，你该用哪些数字呢？

哈佛公开课 - 计算机科学课程节选