coefficient of contact surface width

例句：

1. 1.The coefficient of friction between the two surfaces is crucial for understanding the stability of the system.
   两个表面之间的摩擦系数对于理解系统的稳定至关重要。
2. 2.In order to improve the performance of the device, we need to optimize the coefficient of friction.
   为了提高设备的性能，我们需要优化摩擦系数。
3. 3. The coefficient of friction is a measure of how easily one surface can slide over another.
   摩擦系数是衡量一个表面能否轻易滑过另一个表面的一个度量。