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Why do we sleep and why don't we--why aren't we always awake?
我们为什么会睡觉,我们为什么不是一直醒着？
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$firstVoiceSent
- 来自原声例句
Why do we sleep and why don't we--why aren't we always awake?
我们为什么会睡觉,我们为什么不是一直醒着？
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