traction

n.牵引; 拖拉; 牵引力; 拉力; 牵引(使体内断骨复位的疗法); (车轮等对地面的)附着摩擦力

复数：tractions

牛津词典

noun

牵引；拖拉；牵引力；拉力the action of pulling sth along a surface; the power that is used for doing this

牵引（使体内断骨复位的疗法）a way of treating a broken bone in your body that involves using special equipment to pull the bone gradually back into its correct place

He spent six weeks in traction after he broke his leg.他腿部骨折后做了六个星期的牵引治疗。

（车轮等对地面的）附着摩擦力the force that stops sth, for example the wheels of a vehicle, from sliding on the ground