additional carbon source的用法和样例：
- The best of fermentation media was additive carbon source 1.5% bran and nitrogen source 2.5% casein.
- Galactosylglucose could not be used as the carbon source.
- Organisms dependent on an organic carbon source are termed heterotrophs.
- Bacteria and bacterial residue carry additional carbon and would skew the radiocarbon date toward the present.
- The mycelium pellets was not completed when the carbon source was amylomaltose.