average normal hours per week
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Dr Justin Sherwin and his research team concluded that short-sighted children spent on average 3.7 fewer hours per week outdoors than those who either had normal vision or were long-sighted.
贾斯汀。宣威博士和他的研究小组得出结论，相比于那些视力正常或有远视的孩子，近视孩子的每周平均户外时间少了3.7个小时。
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