单词	dioxide
释义	dioxide noun di·​ox·​ide (ˌ)dī-ˈäk-ˌsīd  : an oxide (such as carbon dioxide) containing two atoms of oxygen in the molecule Example Sentences Recent Examples on the Web Yet the United States as a whole continues to reduce its carbon-dioxide emissions, which have been trending downward since 2007 (no matter who’s president). The Editors, National Review, 12 Sep. 2022 In China, the energy mix also shifted toward cleaner sources, helping to lower carbon-dioxide emissions. Sha Hua, WSJ, 8 Sep. 2022 Carbon dioxide reached an average annual concentration of 414.7 parts per million, up 2.6 parts per million over 2020. Dinah Voyles Pulver, USA TODAY, 1 Sep. 2022 On climate change, the bill pumps money into wind and solar projects, along with the batteries to store renewable energy, while also subsidizing technology to capture and store carbon-dioxide emissions. Siobhan Hughes, WSJ, 6 Aug. 2022 Carbon dioxide levels in the atmosphere last year surpassed 419 parts per million and are continuing to climb. Hayley Smith, Los Angeles Times, 30 June 2022 Carbon dioxide levels vary throughout the year, increasing as vegetation dies and decays in the fall and winter, and decreasing in spring and summer as growing plants absorb the gas through photosynthesis. New York Times, 3 June 2022 Sulfur dioxide levels in the area rose but did not represent a health threat, La Palma’s government said. NBC News, 29 Sep. 2021 Fry, also an associate professor in chemical engineering at BYU, is working in an adjacent building on a next-generation system that uses supercritical carbon-dioxide instead of a conventional steam boiler. Tim Fitzpatrick, The Salt Lake Tribune, 28 July 2022 See More Word History Etymology International Scientific Vocabulary First Known Use circa 1847, in the meaning defined above Phrases Containing dioxide manganese dioxide silicon dioxide lead dioxide sulfur dioxide chlorine dioxide titanium dioxide carbon dioxide nitrogen dioxide manganese dioxide silicon dioxide lead dioxide sulfur dioxide chlorine dioxide titanium dioxide carbon dioxide nitrogen dioxide See More Medical Definition dioxide noun di·​ox·​ide (ˈ)dī-ˈäk-ˌsīd  : an oxide (as carbon dioxide) containing two atoms of oxygen in a molecule
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