短語詞組短語degree e of difficulty 難度系數(shù)degree of operational difficulty 補(bǔ)償average degree of difficulty 平均難度系數(shù)Double Degree Of Difficulty 雙學(xué)位難度high degree of difficulty 高難度degree of difficulty innovates 難度創(chuàng)新degree of difficulty of mining 開採難度系數(shù)The material degree of difficulty 材料難度n ádù degree of difficulty degree 難度 返回 degree of difficulty