combed methane 基本例句 煤层气 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。