a low-key approach的用法和样例：
- Some communities use a low key approach
- He pitched the tune in a lower key.
- Please pitch the tune in a lower key.
- Appearances to Avoid: You don't want to look like a braggart so a modest, low key approach to the entire process is recommended.
- He pitched the tune in a lower key .
- She keeps a low key in life, not liking to show off.