It is no secret that the Harry Potter series is heavily influenced by the classics.

《哈利波特》系列受古典文学的影响很深，这一点人尽皆知。

It is no secret that Miss Deng and Mr Blair are close friends. He is godfather to Grace, her oldest child.

一直以来，邓文迪和布莱尔是亲密朋友这件事已不是秘密。布莱尔是邓文迪长女格雷斯的教父。