Video: 0269_press_pencil_1
Phase transition: break
State before: solid:non_particulate
State after: solid:particulate
Object: In the process of pressing the pencil, all the blue lead and the debris which at the initial frame
目标物体: 在挤压铅笔的过程中，位于初始帧中所有的蓝色笔芯以及碎屑