Well, that program was interesting because it had an inventory which was implemented in Scratch with a list which is kind of like a container that you can add things to again and again.

那个程序很有趣,它有一个用Scratch做出来的清单,还有一个貌似容器的列表,你可以不断往里面加东西。

哈佛公开课 - 计算机科学课程节选