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composition of air | |||
composition of atmosphere | |||
atmospheric composition The chemical abundance in the earth's atmosphere of its constituents including nitrogen, oxygen, argon, carbon dioxide, water vapour, ozone, neon, helium, krypton, methane, hydrogen and nitrous oxide (大气成分中的化学成分,包括氮,氧气,二氧化碳,氦,氩,氪,氙,以及水蒸气,甲烷,氢气,臭氧,氮氧化物。) | |||
atmospheric composition | |||
air composition |
大 气组成 : 5 phrases in 4 subjects |
Aviation | 1 |
Environment | 2 |
Space | 1 |
Technology | 1 |