hollowing knife

例句：

1. 1. The hollowingknife is used to remove the outer layerof a piece of wood.
   空心刀用于去除木材的外层。
2. 2. Heused a hollowing knifeto carve out a nichein the wall.
   他用空心刀在墙上雕刻出一个凹槽。
3. 3. Thehollowing knife was essentialfor the construction of the ancientbuildings.
   空心刀对于古代建筑的建设至关重要。