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Results:
hydrogen exponent : 1）水素指数
hydrogen bond : 1）水素結合
hydrogen ion : 1）水素イオン
hydrogen donor : 1）水素供与体
hydrogen peroxide : 1）（薬品）過酸化水素
hydrogenation : 1）水素付加 2）水素化
hydrogen chloride : 1）塩化水素
hydrogen bomb : 1）水素爆弾
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hydrogen exponent

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