a filthy traitor的用法和样例：
- a dirty (or lousy) trick; a filthy traitor.
- A filthy, disgusting, or morally corrupt place.
- "What a filthy trick," she said with great venom.
- A filthy or soiling substance,such as mud or dust.
- I was pushed into a filthy, stinking room.
- "It is a filthy and vile book", said the priest.