above the knees的用法和样例：
- His leg had to be taken off above the knee.
- Her dress is a full three inch above the knee.
- Her dress was a full three inches above the knee.
- Bend your both the knees and hold the soles just above the floor.
- The stockings were blue above the knee and red below it.
- This joint is approximately 1 inch above the bony rise in the knee.