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n.[化]氧,氧气; 双语释义:n.(名词)[U]氧,氧气 one of the gases which make up the air英英释义: oxygen[ 'ɔksidʒən ]n.a nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic gas; constitutes 21 percent of the atmosphere by volume; th