Nuclear Physics is my major .

原子物理是我的专业。

I know little about nuclear physics.

我对原子物理学所知甚少。

Nuclear physics is a closed book to me.

核物理学是我完全不懂的一门学科。

He's very interested in nuclear physics.

他对核物理学非常感兴趣。

Nuclear physics is a closed book to many of us.

我们许多人对核子物理都一窍不通。