如果可以运行，并通过测试，则会显示一个绿条。
If everything ran and the test passed, the bar would be green.
现在，当运行这个测试时，测试通过，应该可以看到一个绿条。
Now when we run the test, it passes and I should see a green bar.
图表中，绿条代表的是以菜单方式回答的答案的错误率(菜单组)，紫条显示的是两组以键入方式回答的答案的错误率。
On this graph, the green bars represent the questions that could be answered with menus (for the "menu" group). The purple bars show the error rate on questions that both groups had to type.
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