拓展表达-人体器官

bite down on something 要在什么东西上
eg：I bit down om my tongue.

can be

• 会... 或有的时候会...
  Biting down on something hard can be painful.
Dogs can be aggressive.

be 句型

• balloon-shaped 气球形状的
• bean-shaped 豆子形状的

实用表达

I feel pain in my + 器官
There's something wrong with 器官