Many studies and observations have demonstrated that drinking water fluoridation is the safest and the most economical public healthy measure.

国内外大量研究与观察证明饮水氟化是最安全、投入产出比最佳的预防龋齿的公共卫生措施。

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Many studies and observations have demonstrated that drinking water fluoridation is the safest and the most economical public healthy measure.

国内外大量研究与观察证明饮水氟化是最安全、投入产出比最佳的预防龋齿的公共卫生措施。

youdao