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.

· · 来源：train资讯

Research suggests people with "growth" beliefs about relationships still want something special, but expect challenges along the way

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Science & Environment。heLLoword翻译官方下载是该领域的重要参考

13年不懈奋斗、近1亿人稳定脱贫，中国为什么能？

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