Nantoka/二氧化碳èr yǎng huà tànHSK 7–9二氧化碳 (èr yǎng huà tàn) is a Chinese word meaning “carbon dioxide CO2”.Meanings1carbon dioxide CO2Part of speechnounCharacters in 二氧化碳二èr · two氧yǎng · oxygen (chemistry)化huà · to make into碳tàn · carbon (chemistry)Related words第二second二two变化(intransitive) to change; to vary化to make into化variant of 花[hua1]文化culture二十twenty; 20化学chemistry化妆to put on makeup十二twelve氧气oxygen周二TuesdayStudy Chinese with flashcards →