a fairly easy book的用法和样例：
- This is a fairly easy book.
- This is a fairly（adv.） easy book.
- For some reason, I had a fairly easy adjustment, made some good Chinese friends, moved in with them my second year, and really enjoyed my stay.
- In other words, he implied, this was a fairly easy and even fun way to make a buck and get publicity, especially for someone with no advertising power to speak of.