The selling prices drop away from the state purchasing prices.

购销价格倒挂。

《新英汉大辞典》

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When users walk away from the PC they simply hit the button to quickly drop the PC into a low-power mode.

当用户离开PC的时候他们简单地点击一下这个按钮，就可以迅速让PC进入低能耗模式。

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