Big pocket gopher的用法和样例：
- Look, the kangaroo has a big pocket.
- That we call the animals Kangaroo comes from the fact that there is a big pocket in its stomach.
- In my big pocket of windbreaker, I hold a letter that will post to my mother in the south.
- Inside the big pocket of my windbreaker, I had a letter for my mother in the south.
- In case you feel sick and want to throw up,there should be a bag for it in that big pocket at the back of the seat in front of you.