短語詞組短語Conservation law of mass 質(zhì)量守恒定律conservation equation of mass 質(zhì)量守恒方程conservation of mass theorem 質(zhì)量守恒定理average conservation of mass 質(zhì)量守恒法conservation of mass charge 質(zhì)荷守恒conservation of mean mass 平均質(zhì)量守恒法Conservation of Mass and Energy 質(zhì)能守恒conservation of a mass center 質(zhì)心守恒model of conservation of mass 物質(zhì)平衡模型 返回 conservation of mass