whet-slate

例句：

1. 1.The chef uses a whet-slate to sharpen his knives.
   厨师使用磨刀石来磨利他的刀。
2. 2.The whet-slate is located in the kitchen.
   磨刀石位于厨房里。
3. 3. He used a whet-slate to clean his knife.
   他用磨刀石来清洁他的刀。