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单词 nitrogen oxide
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nitrogen oxide
nitrogen oxide n. each of the seven oxides of nitrogen; spec. any one or a mixture of these oxides released into the environment as a result of fuel combustion (esp. nitric oxide, NO, and nitrogen dioxide, NO2).
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1868 H. B. Jones & H. Watts Fownes's Man. Elem. Chem. (ed. 10) 158 The other three nitrogen oxides do not form salts.
1957 Rep. Air Pollution Foundation (U.S.) No. 21. 1 It is now realised that Los Angeles' smog is primarily a reaction between organic matter and nitrogen oxides in the presence of sunlight.
1990 Sci. Amer. May 59/1 The Clean Air Act of 1970, soon to be amended, limits the hydrocarbon, carbon monoxide and nitrogen oxide emissions that are permitted in tail-pipe exhaust.
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