Friction arises because the molecules on both surfaces bond with each other, and resist when the surfaces try to move away and break the bonds.
摩擦力之所以产生，是因为两个表面上的分子彼此粘合，当表面试图移走并打破这种粘合时加以抵抗。
Friction arises because the molecules on both surfaces bond with each other, and resist when the surfaces try to move away and break the bonds.
摩擦力之所以产生，是因为两个表面上的分子彼此粘合，当表面试图移走并打破这种粘合时加以抵抗。
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