Start school later, sleep longer, learn better: New study shows that flexible school start times can be an effective and practical approach to reducing chronic sleep deprivation and improving adolescents’ mental health and academic performance.

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Qatar and Turkey mediated between the two sides, with talks held in Doha and Istanbul. A fragile ceasefire followed, but the negotiations failed to bring about a ceasing of hostilities between the two sides.

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第十九条 国家建立完整的核燃料循环体系，对乏燃料实行循环利用，妥善处理处置放射性废物。

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Мощный удар Израиля по Ирану попал на видео09:41