Video: 0078_assemble_puzzle_3
Phase transition: merge
State before: solid:non_particulate:rigid body
State after: solid:non_particulate:rigid body
Object: In the process of assembling the puzzle, the puzzle piece which is being held by the right hand in the initial frame
目标物体: 在拼图过程中，位于初始帧中右手握住的拼图块