The frictional force remains constant, dependent on the friction, the kinetic friction coefficient, is always the same...
摩擦力不守恒,它取决于摩擦力,动能摩擦系数,一直是相同的。
2
McFaul has been a constant White House advocate of the need to pay close attention to Moscow's views to reduce friction in the UN security council and achieve further progress in arms control.