shear-leg

例句：

1. 1.The shear-legs of the lawn mower are worn out.
   割草机的割草机腿磨损了。
2. 2.The farmer used to use a shear-leg to cut the grass.
   农民过去用割草机来割草。
3. 3. The shear-legs are essential for the operation of the lawn mower.
   割草机操作需要割草机腿。