pre oxygenationpreoxygenation预先: in advance; beforehand呼吸: breathe; respire氧: oxygen呼吸氧量: quantity of respiratory oxygen一次呼吸氧量: single-breath oxygen下载手机词典可随时随地查词查翻译关注微信公众号:chachacidian,回复:预先呼吸氧,即可在微信中查询翻译