这款手机没有了往常的返回按键，用户只要在屏幕上轻轻一点，就可以从正在进行的操作程序中退回主界面。

Featuring an 'all-screen' design, the phone replaces a home button with a universal 'swipe' gesture that takes users back to the devices main screen from wherever they are in its operating system.

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将计算并返回整个缓冲中的每个按键停顿时间的平均值。

The average value for each key dwell time for the entire buffer is computed and returned.

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屏幕底部的四个物理按键在肖像模式下分别用于锁定屏幕、浏览、返回上一屏幕以及并返回主屏幕，但我很少使用。

I rarely used the four physical buttons at the bottom of the screen (in portrait mode) for locking the screen, browsing, returning to a previous screen, and returning to the home screen.

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