程序自动旋转屏幕。
前代nano利用加速度计来在你旋转设备时自动调整屏幕方向。
The previous nano used the accelerometer to automatically reorient the screen when you rotated the device.
旋转手机上下颠倒,或放到口袋里,以自动锁定屏幕和按键。
Rotate the phone upside down or put it into pocket in order to lock screen and keys automatically.
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