a mixed community的用法和样例：
- An Agropyron michnoi-dominated community would be maintained under both treatments over winter, while a mixed community would persist under all-year grazing.
- She was so busy that she was in a mix.
- A mix of people attended the meeting.
- Tastes like a mix of cinnamon and vanilla.
- There is a mixed doubles this afternoon.
- The songs on this record are quite a mixed bag.