abbr. negative 
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azobenzol, azobilirubin, azobisformamide, azo-blue, azocarmine, azochloramide, azocine, azocompound, azocyanidc, azodermine,
相似单词
NEFO, nefrix, nefrosul, nefrosulfin, nefud, neg, negabinary, negamycin, negapillin, negate,