氧
oxygen; oxygen gas
Meanings
2 senses · 10 examplesnoun
oxygen (chemical element)
formalA fundamental chemical element critical for biological respiration and industrial applications.
Oxygen is the most abundant element in the Earth's crust.
Oxygen has very active chemical properties and easily reacts with other substances.
Show 3 more examplesShow fewer examples
Oxygen accounts for approximately 21% of the Earth's atmosphere by volume.
Oxygen is widely present in water and various oxides.
Metals will undergo oxidation reactions with oxygen at high temperatures.
noun
oxygen gas
neutralRefers to breathable oxygen gas in practical application scenarios.
Hospitals often use hyperbaric oxygen to treat patients.
Mountaineers need to carry oxygen cylinders to replenish oxygen at high altitudes.
Show 3 more examplesShow fewer examples
Oxygen deficiency can cause symptoms such as dizziness and difficulty breathing.
You must ensure the oxygen supply equipment works properly when diving.
Liquid oxygen is widely used as an oxidizer in industrial production.