儿童和青少年平均需要十个小时的睡眠时间。

Children and teenagers need an average of about ten hours.

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如果您是平均轨枕，您的睡眠周期如下。

If you are an average sleeper, your sleep cycle is as follows.

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人类平均的睡眠要求是大约7.5小时。

The average human sleep requirement is about 7.5 hours.

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人类平均的睡眠要求是大约7.5小时。

The average human sleep requirement is about 7.5 hours.

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