a violent blow的用法和样例：
- He struck the man a violent blow.
- He gave him a violent blow on the head.
- An injury to an organ, especially the brain, produced by a violent blow and followed by a temporary or prolonged loss of function.
- It seemed to him as though a hard stick was swung full at him by some soldier near, dealing him a violent blow on the head.
- Don't mess with her: she's got a violent temper.
- A violent impatience overcame him.