a snack kingdom的用法和样例：
- The gourmet street, Yunnan Road, is a snack kingdom well known in Shanghai.
- Usually I only have a snack at lunchtime.
- Shall we have a snack at this coffee-shop?
- I'm not hungry but I'd like a snack.
- Foraged a snack from the refrigerator.
- Let's have a snack at the nearest restaurant.