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TOEFL IELTS BNC: 3062 COCA: 3004

carbon noun SUBSTANCE

B2 symbol C [ U ] a chemical element that exists in its pure form as diamond or graphite, and is an important part of other substances such as coal and oil, as well as being contained in all plants and animals

Examples

They used carbon dating tests to authenticate the claim that the skeleton was 2 million years old.

New legislation aims to reduce carbon emissions.

The substance was identified as carbon.

carbon noun DOCUMENT

[ C ] a carbon copy (DOCUMENT) 复写本


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