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单词 nitrous oxide
释义  ni·trous ox·ide /ˌnaɪtrəs ˈɒksaɪd $ -ˈɑːk-/ noun [uncountable]  a gas used by dentists to reduce pain 氧化亚氮，一氧化二氮；笑气 SYN laughing gasExamples from the Corpusnitrous oxide• It would also reduce sulphur dioxide and nitrous oxide emissions, which cause acid rain, by 42,000 tonnes.• Other reactive trace gases such as nitrous oxide and methyl iodide also remain at elevated and aberrant levels.• The researchers have found nylon production to be responsible for up to 10 percent of the increase in nitrous oxide.• The cocktail of greenhouse gases includes chlorofluorocarbons, methane, nitrous oxide and carbon dioxide.• Increasing atmospheric levels of nitrous oxide currently stand at about eight percent above pre-industrial levels.• Once produced, nitrous oxide remains in the atmosphere for about 150 years.• For instance, he taught me how to use nitrous oxide for its effect in combating physical pain.• A can of whipped cream uses nitrous oxide, an anesthetic, as a propellant.ni·trous ox·ide nounChineseSyllable   Corpus gas reduce to pain by dentists used a
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更新时间：2026/7/24 4:55:52