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单词 吸入氧气
例句 DEFINITIVE EXAMPLES 权威例句〔breathe〕Humans take in oxygen and breathe out carbon dioxide.人吸入氧气,呼出二氧化碳。牛津高阶〔mask〕A covering for the nose and mouth that is used for inhaling oxygen or an anesthetic.氧气罩、麻醉罩:用于为嘴或鼻子吸入氧气或麻醉的覆盖物美国传统
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