knife gin saw file

例句：

1. 1. He used a knife tocut the meat.
   他用刀切肉。
2. 2. Thechef needs a sharp knife for cutting vegetables.
   厨师需要一把锋利的刀来切蔬菜。
3. 3. The butcher gave me a knifeto cut the meat.
   屠夫给了我一把刀来切肉。