beam sharpening

例句：

1. 1. The car's headlights need to be beam sharpened.
   汽车的前灯需要磨光。
2. 2. He polished the glass with a soft cloth.
   他用一块软布擦亮了玻璃。
3. 3. The chef used a special tool to beam sharpen the knife.
   厨师用一种特殊的工具来磨利刀。