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atmospheric component
desert.	大气成分
atmospheric component The Earth's atmosphere consists by volume of nitrogen (79,1%), oxygen (20,9%), carbon dioxide (about 0,03%) and traces of the noble gases (argon, krypton, xenon, helium) plus water vapour, traces of ammonia, organic matter, ozone, various salts and suspended solid particles
environ.	大气组成成分 (地球的大气由氮气(19.1%)，氧气(20.9%)，二氧化碳(0.03%)和少许惰性气体(氦，氩，氪，氙)加上水蒸气，少量氨，有机物，臭氧，各种盐和固态悬浮颗粒。)