a sharp sword的用法和样例：
- One hurtful word wounds like a sharp sword.
- Out of his mouth comes a sharp sword with which to strike down the nations.
- The king suggested that Laertes should use a sharp sword with poison on the tip of it.
- Klein's return, like a sharp sword, Tess from a state of numbness Hune thorn Peter.
- But to me, it was like a bullet, ok maybe not a bullet but a sword, like a sharp sword stabbing into me, that kind of pain which would make my whole body twitch.