traction
n[U]
1 (power used in) pulling sth along a surface (在物体平面上的)牵引, 拖拉, 牵引力, 拉力
electric/steam traction 电力[蒸汽]牵引.
2 (medical 医) treatment involving a continuous pull on a limb, etc (对肢体等的)牵引
She´s injured her back and is in traction for a month. 她背部受伤, 正在作一个月的牵引治疗.
3 ability of a tyre or wheel to grip the ground without sliding (轮胎或车轮对地面的)附著摩擦力
Winter tyres give increased traction in mud or snow. 使用冬季专用车胎在泥地或雪地上可增加附著摩擦力.