Video: 0261_slide_pencil_1
Phase transition: break
State before: solid:non_particulate:rigid body
State after: solid:particulate
Object: In the process of sliding the pencil tip, all the parts of the white lead which at the initial frame
目标物体: 在滑动笔尖的过程中，位于初始帧中所有白色铅的部分