a cunning stratagem的用法和样例：
- I was merely a pawn in his cunning stratagem.
- I was merelya pawn in his cunning stratagem.
- Peter seems to have set a cunning trap for you.
- George seems to have laid a cunning trap for you.
- Why did they call him 'a cunning old devil'?
- It was a cunning piece of detective work.