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TOEFL IELTS BNC: 6287 COCA: 5881
nitrogen
ntrədʒən ˈnaɪtrədʒən
N-UNCOUNT ;氮气 Nitrogen is a colourless element that has no smell and is usually found as a gas. It forms about 78% of the earth's atmosphere, and is found in all living things. ;氮气
Trends of nitrogen
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TOEFL IELTS BNC: 6287 COCA: 5881
TOEFL IELTS BNC: 6287 COCA: 5881
TOEFL IELTS BNC: 6287 COCA: 5881
nitrogen
Gases: acetylene, ammonia, argon...
Describing chemicals and chemical processes: active, aerobic, alkaline...

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