Physical exercise can improve physical health and sleeping quality, reducing stress.
运动可以增强体质，改善睡眠质量，消除紧张。
Since 1985, China has carried out 4 health surveys on the physical quality of youth.
从1985年开始，中国进行了四次全国青少年体质健康调查。
Since 1985, China has carried out 4 health surveys on the physical quality of youth.
从1985年开始，中国进行了四次全国青少年体质健康调查。
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