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nitrous oxides短语¹⁴⁴⁹⁷²⁺² 基本英英Thesaurus例句 一氧化氮
名词 nitrous oxide: inhalation anesthetic used as an anesthetic in dentistry and surgeryas in.laughing gas 同义词 N2O,anesthetic laughing gasnoun inhaled anesthetic N2O,anesthetic,nitrous oxide He said that in the UK nitrous oxides had been reduced by 60% since1990 and there had been a reduction in the use of nitrogen fertilisers of nearly a fifth since1998. 从1990年至今,英国一氧化氮的排放量减少了60%,从1998年至今,英国氮肥的使用量减少了近五分之一。 yeeyan |