短語詞組短語specific c mass 比質(zhì)量bladder specific penetration mass 貯囊滲透速率specific mass flow 比質(zhì)量流量specific mass transfer coefficient 比傳質(zhì)系數(shù)mean specific mass balance 量平衡animal specific mass 動物密度specific mass gravity 躰積比重specific mass shift 比質(zhì)量移位 返回 specific mass