研究表明，大部分人需要七，八个小时的睡眠才能保证最佳状态。

Research shows that most people require seven or eight hours of sleep to function optimally.

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研究表明，大部分人需要七，八个小时的睡眠才能保证最佳状态。

Research shows that most people require seven or eight hours of sleep to function optimally.

youdao