右上方的窗格显示变量的值。

The upper-right pane shows the values of variables.

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调试器支持断点、代码单步执行以及显示变量的值。

Debugger supporting breakpoints, stepping through code, and displaying variables.

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按“回车”和命令行进行评价，结果显示变量。

Press "Enter" and the command line is evaluated and the result is displayed for the variable.

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Well, this block here on the left that I came counter counter=0 up with arbitrarily sets a variable called counter equal to 0 and then it forever says that counters value 1 and then it changes the counter by 1.

大家看一下左边的这一段代码,其中有一个随便定义的变量,它会一直显示counter的值,每显示一次，counter加。

哈佛公开课 - 计算机科学课程节选