rear axle nut

例句：

1. 1. The rear axle nuts were loose and required tightening.
   后轴螺母松动了，需要拧紧。
2. 2.The car's rear axle nuts are designed to prevent the wheel from spinning freely.
   汽车的后轴螺母设计用来防止车轮自由旋转。
3. 3. After the accident, the mechanic had to replace all the rear axle nuts.
   事故之后，机械师不得不更换所有的后轴螺母。