| 释义 |
ox.y.genH5Bk7sI7JEn, $5B:k-n [U]a colourless gas that forms a large part of the air on Earth and which is needed by most living things in order for them to live氧气The air has less oxygen in it at high altitudes than it does at low altitudes.地势高的地方比低的地方空气里的氧气少。If people are deprived of oxygen, they either suffer brain damage or die.如果人们吸不到氧气，他们要么脑子受损要么死亡。Oxygen masks are pieces of equipment which can be put over a person's nose and mouth to supply oxygen. They can be used by passengers on an aircraft to help them breathe in an emergency, or by ill people who are having difficulty breathing.氧气面具，氧气罩An oxygen tent is a clear covering put over the head and upper body of an ill person to provide oxygen to help them breathe.（急救输氧用的）氧幕
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