Video: 0397_dissolve_metal_3
Phase transition: melt
State before: solid:non_particulate:rigid body
State after: liquid:viscous
Object: In the process of dissolving the metal, all the undissolved parts of the metal which at the initial frame
目标物体: 在金属溶解的过程中，位于初始帧中所有未溶解的金属的部分