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时间:2024-09-22 06:57:24 来源:网络整理 编辑:新闻中心
炎热的夏天,很多人不耐高热,宁愿呆在家里吹空调也不愿外出活动,殊不知这恰恰错失了“养骨”的好时机。原因一:夏天天气热,人们普遍穿着暴露。因阳光充足,皮肤受紫外线照射后可将皮肤内的7-脱氢胆固醇转化成维
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