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Would you please knock me up at 7 o 'clock?

请7点钟敲门把我叫醒行吗？

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What was his surprise at seeing him go up to a door and knock, and to hear him say, "Dear little sister, let me in."

他非常惊讶看到他来到了一扇门前，然后敲门，然后听到他说，“亲爱的小妹妹，让我进来吧。”

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My body learned when to knock me out because it knew I would always get up at the same time and that my wake-up time wasn't negotiable.

我的身体已经学会了何时叫醒我，因为它知道我总会在同一时刻起床，而且它也知道我总能够为此做出自我调节。