oxygen in coal的用法和样例：
- Theoretical calculation and experiment research show that,organic oxygen in coal is not only profitable to combustion of coal,but can substitute for oxygen enrichment.
- Keywords X-ray photoelectron spectroscopy;oxygen in coal;macerals;
- Plants must have oxygen in order to live.
- France has fallen behind (Germany) in coal production.
- Blood is aerated with oxygen in the lungs.
- He bought in coal for the winter.