n.

1. 碳[U]
2. 复写纸[C][U]
3. 复写的副本[C]
   I want two carbons for our files.

   我要两份复写本存档。

4. 碳精棒

n.

1. the chemical element of atomic number 6, a non-metal which has two main forms (diamond and graphite), occurs in impure form in charcoal, soot, and coal, and is present in all organic compounds. (Symbol: C)
2. carbon dioxide or other gaseous carbon compounds released into the atmosphere, associated with climate change: [as modifier]
   fossil fuel consumption and carbon emissions continued to rise.
3. a rod of carbon in an arc lamp.
4. a piece of carbon paper, or a carbon copy.