短語詞組短語degree e of safety 安全度;安全程度degree e of balance 平衡度degree e of polymerization 聚合度degree e of coalification 煤化程度degree e of purity 純度degree e of oxidation 氧化程度degree e of grinding 粉碎程度degree e of dispersion 彌散度degree e of extraction 回采率 返回 degree of