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

The expectation the S4 will feature eye-tracking capability has been heightened by existing technology in the Galaxy S3 - the phone's Smart Stay function stops the screen from dimming when somebody is looking at it.

BBC: Samsung set for crucial Galaxy S4 smartphone launch

An easy screen-capture function also allows users to instantly save any screen, and these screens can also be personalized with the S Pen before being saved or shared.

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Smart Share Plus also offers the Screen Share function which streams TV content to external viewing devices using a Wi-Fi connection.

ENGADGET: LG unveils new 3D glasses, hopes lighter and better looking spectacles drive adoption