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1·The American Dental Association, which has supported fluoridation of community water since 1950, says scientists continue to show adding the mineral to water is safe and aids tooth health.

美国牙齿组织，自1950年起支持水中氟化物，说科学家们持续的展示在水中添加矿物质是安全并对牙齿有益的。

2·Objective To investigate the association of lipoprotein receptor-related protein 5(LRP5) gene Q89R, A1330V polymorphism with bone mineral density(BMD) in premenopausal Northern Chinese women.

目的探讨中国北方绝经前妇女低密度脂蛋白受体相关蛋白5（LRP5）基因Q89R、A1330V多态性与骨密度关系。