a polemic writer的用法和样例：
- In place of the scholarly tome that many people expected of him, Mr White has produced a polemic, and not a very good one at that. As the woman said, we are not amused.
- The New Testament is a polemic book almost from beginning to end.
- It is not within the scope of this chapter to engage in a polemic discussion; however, a few general comments may not be out of place here.
- Such a book does credit to the writer.