The key concept in this book, I think it is fair to say, is freedom.这本书的核心概念，我认为要公平地讲，就是自由。

She's not entirely to blame, but it's (only) fair to say that she handled the situation badly.不能完全责怪她，但要是（仅仅）说句公道话，这件事她处理得很糟。