oxygen是什么
4个回答

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.