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抗議其後演變為民主運動，成為1997年香港主權移交中國以來，對政府最嚴峻的挑戰。
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魅族手机或将成为历史：业务实质性停摆，3月正式退市
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.
· 张伟 · 来源：study资讯