molar frictional coefficient

例句：

1. 1.The coefficient of friction between the two materials is very high.
   两种材料的摩擦系数非常高。
2. 2. The coefficient of friction affects the speed of the vehicle.
   摩擦系数影响车辆的速度。
3. 3. The coefficient of friction can be used to calculate the force required to move a material.
   摩擦系数可以用来计算移动材料所需的力。