要服从质量守恒定律。

We write it subject to conservation of mass.

youdao

显然是质量守恒，而不是摩尔数守恒。

So, clearly, mass is conserved, not mole Numbers.

youdao

同时，引入质量守恒方程，得出弹体的比例尺度换算关系。

The relation of scale conversion is gotten by use of the mass conservation equation.

youdao

同时，引入质量守恒方程，得出弹体的比例尺度换算关系。

The relation of scale conversion is gotten by use of the mass conservation equation.

youdao