a ham sandwich的用法和样例：
- I'd like a ham sandwich and two cups of coffee.
- I'd like a ham sandwich,a salad and a cup of tea.
- Who wants to swap a ham sandwich for a cheese and tomato?
- I would like a ham sandwich on wheat, please hold the onion.
- In the bidet were orange peels and the remnants of a ham sandwich.
- I had a ham sandwich as lunch.