So this is a little scale that if you put something here or here it's supposed to tell you which one is heavier and I also have 8 cups here.

这是一个小天平，如果你在这边,或者这边放一些东西，它就会显示哪边的更重,我这有8个杯子。

哈佛公开课 - 计算机科学课程节选