Video: 0245_tie_shoelaces_4
Phase transition: twist
State before: solid:non_particulate:flexible body
State after: solid:non_particulate:flexible body
Object: In the process of tying the shoelaces, the parts of the shoelaces which at the initial frame
目标物体: 在系鞋带的过程中，位于初始帧中鞋带的部分