conservation of mass 质量守恒定律 ; [物] 质量守恒 ; 质量不减

law of conservation of mass [物] 质量守恒定律 ; 质量不灭定律 ; 物质守恒定律 ; 质量守恒律

law od conservation of mass 质量守恒定律

l l conservation of Mass 质量守恒

law of conservation of mass-energy 质能不灭定律 ; 质能守恒定律

Conservation of Mass and Energy 质能守恒

principle of conservation of mass 质量守恒定理

conservation of mass theorem 质量守恒定理

non-conservation of mass 质量不守恒

conservation of mass energy 质量能量守恒