单词	ammonium persulfate
释义	ammonium persulfate noun : a colorless crystalline salt (NH4)2S2O8 used as an oxidizing agent and for improving dense photographic negatives Word History First Known Use 1891, in the meaning defined above
随便看	sistrurusses sists Siswati sisymbrium Sisyphean sisyphi sisyphian Sisyphus sisyphuses sisyphusses Sisyridae sisyridaes sisyrinchia sisyrinchium sisyrinchiums sit sit about sit around sit back sit bolt upright sit by sit idly by sit in sit in judgment sit in on

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