It's a little puzzle piece that says when the green flag is clicked and this is kind ; of like the beginning of a program; when you double click an icon on your desktop this is how something like that is implemented; it's listening for that double click, it's listening for that green flag.

是一小个按钮，它的意思是,何时点击绿色旗帜,这就好比开始运行程序;,当你双击桌面上的图标,就开始执行操作,桌面的图标需要双击，绿色小旗也等待点击来执行命令。

哈佛公开课 - 计算机科学课程节选

What TEAL does is a number of things, most importantly, from a lot of new point is we introduce physics laboratory at the terms of small desktop experience that are done in the classtory.

而TEAL项目所做的事情有很多，最重要的是提出了一个新观念,即引入物理实验室,以小型桌面实验为主的,在一种新型教室里进行。

麻省理工公开课 - 媒体、教育、市场课程节选