a cunning liar的用法和样例：
- Our each pace helps us abridging the distance with resurrection and we know that frustration is a cunning liar, making you feel mentally and physically exhausted when you get closest to success.
- 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.