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播放时:倒退3秒/复读时长按:回退AB段
播放时:快进3秒/复读时长按:前进AB段
拖动:改变速度/点击:恢复正常速度1.0
点击:复读最近5秒/拖动:改变复读次数
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English in a Minute: Back to Square One

Where and what is "square one?" And why would you want to return to it? Watch this video to figure out how to use this common American English expression.