短語詞組短語base earnings ratio 基準收益率base height ratio 底高比;基線航高比base pair ratio 堿基對比率base pairing ratio 堿基配對比率;釋義堿基配對比率Base Speed Ratio 基速比base load ratio 基礎負荷系數(shù)base mixing ratio 基層配合比base height ratio west bank 底高比extension of base field ratio 伸長比 返回 base ratio