单词：coalbed
coalbed的用法和样例：
例句
- Coalbed methane is a natural gas resources adsorbed to the coal reservoir.煤层气是一种以吸附态储集在煤层中的天然气资源。
- It is significant to prediction of coalbed permeability and resource evaluation of coalbed methane.其结果对煤层气资源评价和煤层渗透性预测具有重要的指导意义。
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