Read Edit View history 氮氧化物 dànyǎnghuàwù nitrogen oxide Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 氮氧化物 · dànyǎnghuàwù · nitrogen oxide 2026/03/04 氮氧化物 dànyǎnghuàwù nitrogen oxide nitrogen oxide 减少汽车排放的氮氧化物是改善空气质量的关键。 noun created sense Mar 4, 2026, 02:25 AM