knife for giant wax gourd

例句：

1. 1. He used a knife to cut the meat.
   他用刀切肉。
2. 2. The chef carefully sharpened the knife for each dish.
   厨师仔细磨利每道菜的刀。
3. 3. The knife was rusted and needed to be sharpened.
   这把刀生锈了，需要磨利。