a knight of the pen的用法和样例：
- That was only a slip of the pen.
- In Arthurian legend, a Knight of the Round Table and the husband of Enid.
- In Arthurian legend,a Knight of the Round Table and the husband of Enid.
- You can do it with a stroke of the pen.
- In Arthurian legend, a nephew of King Arthur and a Knight of the Round Table.
- Michael went hurriedly to look out the window. "A knight," he reported. "A Knight of the Rose, by his armor.