Stiff - The spring stiffness for edges (how much the edges are stretched).A low value means very weak springs (a very elastic material), a high value is a strong spring (a stiffer material).

• 硬度-边的弹簧硬度(多少边被伸展).；一个低的数值意味很弱的弹簧(一个最柔性材料)；一个高的数值是一个强力弹簧(一个较强的材料)。