built-in sharpener

例句：

1. 1.This built-in sharpener is perfect for cutting through tough materials.
   这个内置磨刀器非常适合切割硬材料。
2. 2. The built-in sharpener in the kitchen cabinet is very convenient for daily use.
   厨房橱柜里的内置磨刀器非常方便日常使用。
3. 3. I always keep a built-in sharpener on hand for quick repairs around the house.
   我总是会随身携带一个内置磨刀器，以便快速修理家里的物品。