If you scroll back up on the printout or screen here, you'll see that you can actually not only declare function's prototypes, their general structure.

如果我回滚到打印输出或者这个屏幕，你们将看到你们不仅可以声明函数的原型,它们的一般结构。

哈佛公开课 - 计算机科学课程节选

and your only job during this tasks is to press the button when that target comes on before it leaves the screen.

而你在这些任务中唯一要做的事,就是在目标出现未消失前按下按钮。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选