例句與造句

1. Traction can also refer to the " maximum " tractive force between a body and a surface, as limited by available friction; when this is the case, traction is often expressed as the ratio of the maximum tractive force to the normal force and is termed the " coefficient of traction " ( similar to coefficient of friction ).
2. It's difficult to find coefficient of traction in a sentence. 用coefficient of traction造句挺難的