cutter bit sharpener

例句：

1. 1.He uses a cleaver to cut through tough meat.
   他用一把锯子来切硬肉。
2. 2. The chef needs a sharpening stone to keep his knife sharp.
   厨师需要一块磨刀石来保持他的刀锋利。
3. 3.The sharpener is essential for maintaining the edge of any cutting tool.
   磨刀石对于维护任何切割工具的刃口都是必要的。