a serial rapist的用法和样例：
- Mark: I think I know why. There's a serial rapist on the loose there, right? I heard it on the news.
- Sean has been operating pro bono on victims of The Carver, a serial rapist who chooses good-looking people and carves their faces as a message to society about beauty and conformity.
- The serial rapist has struck again.
- A serial counter is also called a ripple counter.
- Pair bullying is a serial bully with a colleague.