ice knife

例句：

1. 1. He used to play hockey withhis friends on the ice rink.
   他以前在冰球场上和他的朋友们一起打曲棍球。
2. 2. She was so coldthat she had to use an ice knifeto cut through the ice.
   她太冷了，不得不用冰刀来割开冰。
3. 3. The ice knife glintedin the sunlight as it sliced through thefrozen lake.
   那把冰刀在阳光下闪闪发光，它切过冰冻的湖面。