carbon
柯林斯词典
1. N-UNCOUNT Carbon is a chemical element that diamonds and coal are made up of. (化学元素) 碳
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carbon /ˈkɑːbən/
剑桥词典
- 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 (SUBSTANCE)
[ 不可数或单数名词：没有复数形式的名词 ] (symbol C)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
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范例
carbon noun (DOCUMENT)
[ 可数名词：有复数形式的名词 ]a carbon copy (DOCUMENT)
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