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- Chemistry a compound containing two oxygen atoms bonded together in its molecule or as the anion O2-2【化】过氧化物。
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- mass noun hydrogen peroxide, especially as used as a bleach for the hair（尤指用作漂白头发的）过氧化氢：
as modifier a peroxide blonde.一个用过氧化氢漂白过头发的金发女子。
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