Kids should not carry backpacks that weigh more than 10 to 15 percent of their body weight.

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Kidsshouldnotcarrybackpacksthatweighmorethan10to15percentoftheirbodyweight.Kidsshouldnotcarrybackpac

Kids should not carry backpacks that weigh more than 10 to 15 percent of their body weight.
Kids should not carry backpacks that weigh more than 10 to 15 percent of their body weight.

Kids should not carry backpacks that weigh more than 10 to 15 percent of their body weight.
孩子们不应该携带书包重量超过10到百分之十五的体重.