bite off

例句：

1. 1.She bit off a piece of her sandwich and took a bite.
   她咬了一口三明治。
2. 2.The dog bit off a chunk of meat from the bone.
   狗从骨头上咬下了一块肉。
3. 3. He bit off his lip to stop his teeth chattering.
   他咬破了嘴唇，止住了牙齿的颤抖。