nitrogen oxides

常見例句

• In the spark-ignition engine, recirculating some of the exhaust gas reduces the emission of nitrogen oxides.
  在火花點火的發(fā)動機中，再循環(huán)的一部分廢氣減少了氧化氮的有害汙染物。
• The concentrations of nitrogen dioxide and ozone also exceed the objectives for a few days in a year.
  二氧化氮及臭氧的濃度，每年也有幾天超出了空氣質(zhì)素指標(biāo)。
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