bitten by animal and insect

例句：

1. 1.The dog bit the boy on the leg.
   狗咬了男孩的腿。
2. 2.She ate a bite of cake before dinner.
   晚饭前她吃了一小块蛋糕。
3. 3.The cat nipped at the mouse with its sharp teeth.
   猫用锋利的牙齿咬住了老鼠。