mass conservation的用法和样例：
例句
- Under these conditions the conservation of energy is equivalent to the conservation of mass.
在这种条件下，能量守恒和质量守恒是相等的。 - The computational results show that, compared with CM, FVM is less dependent on mesh density and has smaller error in calculating mass conservation.
还分析了两种方法对网格密度的依赖性和质量守恒计算误差，显示有限体积法均优于特徵线法。
