mass conservation 質(zhì)量守恒；質(zhì)量不變mass concrete 大塊混凝土；無鋼筋混凝土mass concentration factor [經(jīng)濟學]質(zhì)量濃度系數(shù)mass concentration [分化] 質(zhì)量濃度mass communications 大眾通訊；多路通信；大眾傳媒mass communication medium [計算機科學技術(shù)]大眾通信媒體mass communication media [文學]大眾傳媒[體育]大眾傳媒mass collaboration 大規(guī)模協(xié)作mass chest radiography unit [醫(yī)藥科學]團檢用胸部放射攝影機mass centre 重心；質(zhì)量中心mass casualty 集體事故mass balance [物] 質(zhì)量平衡；物料平衡mass audience venue [商業(yè)]公共場所mass audience analysis [管理學]大量觀眾分析[心理學]大量觀眾分析mass audience 大眾受眾mass assignment 質(zhì)量數(shù)測定mass analyzer [物] 質(zhì)量分析器mass affluent 大眾富裕mass account transfer instruction [經(jīng)濟學]大量戶口轉(zhuǎn)移指示mass absorption law [化學]質(zhì)量吸收定律