慢动作和逐帧播放可以让你放大关键动作，真正的看清动作。
Slow-motion and freeze-frame footage allows you to zoom in on key moves and really SEE how to do them.
你甚至可以按住按钮不放，逐帧的截取正在播放的屏幕保护界面和视频界面。
You can capture literally any screenshot, including the lock screensaver, video as it’s playing, even as you’re holding a button down.
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