oxygen是什么

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oxygen是什么

oxygen ['ɔksidʒən]
n.氧, 氧气
例句:
Water contains hydrogen and oxygen.
水含有氢和氧.
Oxygen masks are used in aircraft only in emergencies.
飞机上的氧气面具只用於紧急情况.
Hydrogen and oxygen are gases.
氢和氧是气体.

oxygen是什么翻译oxygen masks gas oxygen 怎么翻译 Trees produce oxygen,为什么不是Trees provide oxygen Hydrogen and oxygen,( ) ,are gases Once_____ oxygen ,the brain dies . In means green ,oxygen ,light and foot. Carbon Dioxide or Carbon Oxygen 2? We ____ in oxygen in the air metal–oxygen 化学专业英语. Once ___of oxygen ,the brain dies. Hydrogen and oxygen c___ to form water