该上床睡觉的时候；就寝时间
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该上床睡觉的时候；就寝时间；该上床睡觉的时候；就寝时间
the time when one should go to bed
It's time for bed, so please brush your teeth.
该上床睡觉了,所以请刷牙。
该上床睡觉的时候；就寝时间
the time when one should go to bed
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