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词汇
fluoride
例句
Some dentists are convinced that the addition of
fluoride
in water is ineffective as a prophylactic treatment.
有些牙医坚信在水中加氟化物不是有效的预防措施。
Most urban water supplies in the United States now contain
fluoride
in varying amounts.
现在美国大部分城市供水中都存在含量不一的氟化物。
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更新时间:2025/3/4 8:44:16